RHSA-2026:0533
Vulnerability from csaf_redhat - Published: 2026-01-14 00:17 - Updated: 2026-01-15 03:57Summary
Red Hat Security Advisory: kernel security update
Notes
Topic
An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)
* kernel: smb: client: fix race with concurrent opens in rename(2) (CVE-2025-39825)
* kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare (CVE-2025-39817)
* kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() (CVE-2023-53401)
* kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory (CVE-2025-39883)
* kernel: e1000e: fix heap overflow in e1000_set_eeprom (CVE-2025-39898)
* kernel: nbd: fix incomplete validation of ioctl arg (CVE-2023-53513)
* kernel: NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL (CVE-2023-53680)
* kernel: scsi: ses: Fix possible desc_ptr out-of-bounds accesses (CVE-2023-53675)
* kernel: media: rc: fix races with imon_disconnect() (CVE-2025-39993)
* kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv() (CVE-2023-53705)
* kernel: libceph: fix potential use-after-free in have_mon_and_osd_map() (CVE-2025-68285)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
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"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()\n\nKCSAN found an issue in obj_stock_flush_required():\nstock-\u003ecached_objcg can be reset between the check and dereference:\n\n==================================================================\nBUG: KCSAN: data-race in drain_all_stock / drain_obj_stock\n\nwrite to 0xffff888237c2a2f8 of 8 bytes by task 19625 on cpu 0:\n drain_obj_stock+0x408/0x4e0 mm/memcontrol.c:3306\n refill_obj_stock+0x9c/0x1e0 mm/memcontrol.c:3340\n obj_cgroup_uncharge+0xe/0x10 mm/memcontrol.c:3408\n memcg_slab_free_hook mm/slab.h:587 [inline]\n __cache_free mm/slab.c:3373 [inline]\n __do_kmem_cache_free mm/slab.c:3577 [inline]\n kmem_cache_free+0x105/0x280 mm/slab.c:3602\n __d_free fs/dcache.c:298 [inline]\n dentry_free fs/dcache.c:375 [inline]\n __dentry_kill+0x422/0x4a0 fs/dcache.c:621\n dentry_kill+0x8d/0x1e0\n dput+0x118/0x1f0 fs/dcache.c:913\n __fput+0x3bf/0x570 fs/file_table.c:329\n ____fput+0x15/0x20 fs/file_table.c:349\n task_work_run+0x123/0x160 kernel/task_work.c:179\n resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]\n exit_to_user_mode_loop+0xcf/0xe0 kernel/entry/common.c:171\n exit_to_user_mode_prepare+0x6a/0xa0 kernel/entry/common.c:203\n __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]\n syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296\n do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nread to 0xffff888237c2a2f8 of 8 bytes by task 19632 on cpu 1:\n obj_stock_flush_required mm/memcontrol.c:3319 [inline]\n drain_all_stock+0x174/0x2a0 mm/memcontrol.c:2361\n try_charge_memcg+0x6d0/0xd10 mm/memcontrol.c:2703\n try_charge mm/memcontrol.c:2837 [inline]\n mem_cgroup_charge_skmem+0x51/0x140 mm/memcontrol.c:7290\n sock_reserve_memory+0xb1/0x390 net/core/sock.c:1025\n sk_setsockopt+0x800/0x1e70 net/core/sock.c:1525\n udp_lib_setsockopt+0x99/0x6c0 net/ipv4/udp.c:2692\n udp_setsockopt+0x73/0xa0 net/ipv4/udp.c:2817\n sock_common_setsockopt+0x61/0x70 net/core/sock.c:3668\n __sys_setsockopt+0x1c3/0x230 net/socket.c:2271\n __do_sys_setsockopt net/socket.c:2282 [inline]\n __se_sys_setsockopt net/socket.c:2279 [inline]\n __x64_sys_setsockopt+0x66/0x80 net/socket.c:2279\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nvalue changed: 0xffff8881382d52c0 -\u003e 0xffff888138893740\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 1 PID: 19632 Comm: syz-executor.0 Not tainted 6.3.0-rc2-syzkaller-00387-g534293368afa #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023\n\nFix it by using READ_ONCE()/WRITE_ONCE() for all accesses to\nstock-\u003ecached_objcg.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A race in the memcg/objcg accounting allowed stock-\u003ecached_objcg to change between check and use, leading to a NULL pointer dereference and kernel crash under concurrency. The fix uses READ_ONCE/WRITE_ONCE for all accesses to cached_objcg, eliminating the data race observed by KCSAN. Impact is a local kernel DoS",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"url": "https://www.cve.org/CVERecord?id=CVE-2023-53401"
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{
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53401"
},
{
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"summary": "https://lore.kernel.org/linux-cve-announce/2025091800-CVE-2023-53401-b668@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025091800-CVE-2023-53401-b668@gregkh/T"
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"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"url": "https://access.redhat.com/errata/RHSA-2026:0533"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
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"details": "Moderate"
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"title": "kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()"
},
{
"cve": "CVE-2023-53513",
"cwe": {
"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
},
"discovery_date": "2025-10-01T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2400795"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: fix incomplete validation of ioctl arg\n\nWe tested and found an alarm caused by nbd_ioctl arg without verification.\nThe UBSAN warning calltrace like below:\n\nUBSAN: Undefined behaviour in fs/buffer.c:1709:35\nsigned integer overflow:\n-9223372036854775808 - 1 cannot be represented in type \u0027long long int\u0027\nCPU: 3 PID: 2523 Comm: syz-executor.0 Not tainted 4.19.90 #1\nHardware name: linux,dummy-virt (DT)\nCall trace:\n dump_backtrace+0x0/0x3f0 arch/arm64/kernel/time.c:78\n show_stack+0x28/0x38 arch/arm64/kernel/traps.c:158\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x170/0x1dc lib/dump_stack.c:118\n ubsan_epilogue+0x18/0xb4 lib/ubsan.c:161\n handle_overflow+0x188/0x1dc lib/ubsan.c:192\n __ubsan_handle_sub_overflow+0x34/0x44 lib/ubsan.c:206\n __block_write_full_page+0x94c/0xa20 fs/buffer.c:1709\n block_write_full_page+0x1f0/0x280 fs/buffer.c:2934\n blkdev_writepage+0x34/0x40 fs/block_dev.c:607\n __writepage+0x68/0xe8 mm/page-writeback.c:2305\n write_cache_pages+0x44c/0xc70 mm/page-writeback.c:2240\n generic_writepages+0xdc/0x148 mm/page-writeback.c:2329\n blkdev_writepages+0x2c/0x38 fs/block_dev.c:2114\n do_writepages+0xd4/0x250 mm/page-writeback.c:2344\n\nThe reason for triggering this warning is __block_write_full_page()\n-\u003e i_size_read(inode) - 1 overflow.\ninode-\u003ei_size is assigned in __nbd_ioctl() -\u003e nbd_set_size() -\u003e bytesize.\nWe think it is necessary to limit the size of arg to prevent errors.\n\nMoreover, __nbd_ioctl() -\u003e nbd_add_socket(), arg will be cast to int.\nAssuming the value of arg is 0x80000000000000001) (on a 64-bit machine),\nit will become 1 after the coercion, which will return unexpected results.\n\nFix it by adding checks to prevent passing in too large numbers.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: nbd: fix incomplete validation of ioctl arg",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-53513"
},
{
"category": "external",
"summary": "RHBZ#2400795",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2400795"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-53513",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-53513"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-53513",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53513"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025100130-CVE-2023-53513-4667@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025100130-CVE-2023-53513-4667@gregkh/T"
}
],
"release_date": "2025-10-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: nbd: fix incomplete validation of ioctl arg"
},
{
"cve": "CVE-2023-53675",
"discovery_date": "2025-10-07T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2402293"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ses: Fix possible desc_ptr out-of-bounds accesses\n\nSanitize possible desc_ptr out-of-bounds accesses in\nses_enclosure_data_process().",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: scsi: ses: Fix possible desc_ptr out-of-bounds accesses",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The ses_enclosure_data_process() routine did not sufficiently validate descriptor pointer positions before dereferencing them, which could allow the parser to read beyond the buffer when a device or crafted input reports malformed enclosure pages. The fix adds strict pointer and length checks to avoid out-of-bounds accesses.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-53675"
},
{
"category": "external",
"summary": "RHBZ#2402293",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402293"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-53675",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-53675"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-53675",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53675"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025100707-CVE-2023-53675-e7ac@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025100707-CVE-2023-53675-e7ac@gregkh/T"
}
],
"release_date": "2025-10-07T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"url": "https://access.redhat.com/errata/RHSA-2026:0533"
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"category": "impact",
"details": "Moderate"
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],
"title": "kernel: scsi: ses: Fix possible desc_ptr out-of-bounds accesses"
},
{
"cve": "CVE-2023-53680",
"discovery_date": "2025-10-07T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2402213"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Avoid calling OPDESC() with ops-\u003eopnum == OP_ILLEGAL\n\nOPDESC() simply indexes into nfsd4_ops[] by the op\u0027s operation\nnumber, without range checking that value. It assumes callers are\ncareful to avoid calling it with an out-of-bounds opnum value.\n\nnfsd4_decode_compound() is not so careful, and can invoke OPDESC()\nwith opnum set to OP_ILLEGAL, which is 10044 -- well beyond the end\nof nfsd4_ops[].",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: NFSD: Avoid calling OPDESC() with ops-\u003eopnum == OP_ILLEGAL",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "NFSD could call OPDESC() with opnum == OP_ILLEGAL, indexing past nfsd4_ops[] and causing an out-of-bounds read leading to a crash. A remote unauthenticated NFSv4 client could trigger this via a crafted COMPOUND, impacting availability of the NFS server. The fix sets op-\u003eopdesc = NULL, assigns opdesc only when opnum is in range, and removes the unconditional OPDESC() call.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-53680"
},
{
"category": "external",
"summary": "RHBZ#2402213",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402213"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-53680",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-53680"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-53680",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53680"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025100708-CVE-2023-53680-501d@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025100708-CVE-2023-53680-501d@gregkh/T"
}
],
"release_date": "2025-10-07T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:0533"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent module nfs from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: NFSD: Avoid calling OPDESC() with ops-\u003eopnum == OP_ILLEGAL"
},
{
"cve": "CVE-2023-53705",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2025-10-22T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2405713"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: Fix out-of-bounds access in ipv6_find_tlv()\n\noptlen is fetched without checking whether there is more than one byte to parse.\nIt can lead to out-of-bounds access.\n\nFound by InfoTeCS on behalf of Linux Verification Center\n(linuxtesting.org) with SVACE.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The function ipv6_find_tlv() parsed IPv6 extension headers without checking that at least two bytes were available before reading the option length field.\nAn attacker could send a malformed IPv6 packet with a truncated extension header, causing an out-of-bounds read and potential kernel crash or memory fault while parsing.\nThe fix adds a length check (if (len \u003c 2) goto bad;) before accessing the second byte, preventing buffer overrun.\nThis issue is remotely triggerable via network traffic and can lead to kernel panic (DoS) or, in rare cases, information leakage through speculative execution paths.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-53705"
},
{
"category": "external",
"summary": "RHBZ#2405713",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2405713"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-53705",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-53705"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-53705",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53705"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025102212-CVE-2023-53705-38d9@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025102212-CVE-2023-53705-38d9@gregkh/T"
}
],
"release_date": "2025-10-22T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv()"
},
{
"cve": "CVE-2025-38051",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2025-06-18T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2373329"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_fill_dirent\n\nThere is a race condition in the readdir concurrency process, which may\naccess the rsp buffer after it has been released, triggering the\nfollowing KASAN warning.\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in cifs_fill_dirent+0xb03/0xb60 [cifs]\n Read of size 4 at addr ffff8880099b819c by task a.out/342975\n\n CPU: 2 UID: 0 PID: 342975 Comm: a.out Not tainted 6.15.0-rc6+ #240 PREEMPT(full)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x53/0x70\n print_report+0xce/0x640\n kasan_report+0xb8/0xf0\n cifs_fill_dirent+0xb03/0xb60 [cifs]\n cifs_readdir+0x12cb/0x3190 [cifs]\n iterate_dir+0x1a1/0x520\n __x64_sys_getdents+0x134/0x220\n do_syscall_64+0x4b/0x110\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n RIP: 0033:0x7f996f64b9f9\n Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89\n f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01\n f0 ff ff 0d f7 c3 0c 00 f7 d8 64 89 8\n RSP: 002b:00007f996f53de78 EFLAGS: 00000207 ORIG_RAX: 000000000000004e\n RAX: ffffffffffffffda RBX: 00007f996f53ecdc RCX: 00007f996f64b9f9\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n RBP: 00007f996f53dea0 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000207 R12: ffffffffffffff88\n R13: 0000000000000000 R14: 00007ffc8cd9a500 R15: 00007f996f51e000\n \u003c/TASK\u003e\n\n Allocated by task 408:\n kasan_save_stack+0x20/0x40\n kasan_save_track+0x14/0x30\n __kasan_slab_alloc+0x6e/0x70\n kmem_cache_alloc_noprof+0x117/0x3d0\n mempool_alloc_noprof+0xf2/0x2c0\n cifs_buf_get+0x36/0x80 [cifs]\n allocate_buffers+0x1d2/0x330 [cifs]\n cifs_demultiplex_thread+0x22b/0x2690 [cifs]\n kthread+0x394/0x720\n ret_from_fork+0x34/0x70\n ret_from_fork_asm+0x1a/0x30\n\n Freed by task 342979:\n kasan_save_stack+0x20/0x40\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x60\n __kasan_slab_free+0x37/0x50\n kmem_cache_free+0x2b8/0x500\n cifs_buf_release+0x3c/0x70 [cifs]\n cifs_readdir+0x1c97/0x3190 [cifs]\n iterate_dir+0x1a1/0x520\n __x64_sys_getdents64+0x134/0x220\n do_syscall_64+0x4b/0x110\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n The buggy address belongs to the object at ffff8880099b8000\n which belongs to the cache cifs_request of size 16588\n The buggy address is located 412 bytes inside of\n freed 16588-byte region [ffff8880099b8000, ffff8880099bc0cc)\n\n The buggy address belongs to the physical page:\n page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99b8\n head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n anon flags: 0x80000000000040(head|node=0|zone=1)\n page_type: f5(slab)\n raw: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001\n raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000\n head: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001\n head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000\n head: 0080000000000003 ffffea0000266e01 00000000ffffffff 00000000ffffffff\n head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff8880099b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8880099b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n \u003effff8880099b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ^\n ffff8880099b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8880099b8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ==================================================================\n\nPOC is available in the link [1].\n\nThe problem triggering process is as follows:\n\nProcess 1 Process 2\n-----------------------------------\n---truncated---",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: smb: client: Fix use-after-free in cifs_fill_dirent",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-38051"
},
{
"category": "external",
"summary": "RHBZ#2373329",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373329"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38051",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38051"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38051",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38051"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025061831-CVE-2025-38051-77da@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025061831-CVE-2025-38051-77da@gregkh/T"
}
],
"release_date": "2025-06-18T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"url": "https://access.redhat.com/errata/RHSA-2026:0533"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: smb: client: Fix use-after-free in cifs_fill_dirent"
},
{
"cve": "CVE-2025-39817",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2025-09-16T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2395805"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nefivarfs: Fix slab-out-of-bounds in efivarfs_d_compare\n\nObserved on kernel 6.6 (present on master as well):\n\n BUG: KASAN: slab-out-of-bounds in memcmp+0x98/0xd0\n Call trace:\n kasan_check_range+0xe8/0x190\n __asan_loadN+0x1c/0x28\n memcmp+0x98/0xd0\n efivarfs_d_compare+0x68/0xd8\n __d_lookup_rcu_op_compare+0x178/0x218\n __d_lookup_rcu+0x1f8/0x228\n d_alloc_parallel+0x150/0x648\n lookup_open.isra.0+0x5f0/0x8d0\n open_last_lookups+0x264/0x828\n path_openat+0x130/0x3f8\n do_filp_open+0x114/0x248\n do_sys_openat2+0x340/0x3c0\n __arm64_sys_openat+0x120/0x1a0\n\nIf dentry-\u003ed_name.len \u003c EFI_VARIABLE_GUID_LEN , \u0027guid\u0027 can become\nnegative, leadings to oob. The issue can be triggered by parallel\nlookups using invalid filename:\n\n T1\t\t\tT2\n lookup_open\n -\u003elookup\n simple_lookup\n d_add\n // invalid dentry is added to hash list\n\n\t\t\tlookup_open\n\t\t\t d_alloc_parallel\n\t\t\t __d_lookup_rcu\n\t\t\t __d_lookup_rcu_op_compare\n\t\t\t hlist_bl_for_each_entry_rcu\n\t\t\t // invalid dentry can be retrieved\n\t\t\t -\u003ed_compare\n\t\t\t efivarfs_d_compare\n\t\t\t // oob\n\nFix it by checking \u0027guid\u0027 before cmp.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-39817"
},
{
"category": "external",
"summary": "RHBZ#2395805",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395805"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-39817",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-39817"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-39817",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39817"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025091615-CVE-2025-39817-90b7@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025091615-CVE-2025-39817-90b7@gregkh/T"
}
],
"release_date": "2025-09-16T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare"
},
{
"cve": "CVE-2025-39825",
"cwe": {
"id": "CWE-366",
"name": "Race Condition within a Thread"
},
"discovery_date": "2025-09-16T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2395792"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix race with concurrent opens in rename(2)\n\nBesides sending the rename request to the server, the rename process\nalso involves closing any deferred close, waiting for outstanding I/O\nto complete as well as marking all existing open handles as deleted to\nprevent them from deferring closes, which increases the race window\nfor potential concurrent opens on the target file.\n\nFix this by unhashing the dentry in advance to prevent any concurrent\nopens on the target.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: smb: client: fix race with concurrent opens in rename(2)",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-39825"
},
{
"category": "external",
"summary": "RHBZ#2395792",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395792"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-39825",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-39825"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-39825",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39825"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025091616-CVE-2025-39825-8a7a@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025091616-CVE-2025-39825-8a7a@gregkh/T"
}
],
"release_date": "2025-09-16T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: smb: client: fix race with concurrent opens in rename(2)"
},
{
"cve": "CVE-2025-39883",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-09-23T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2397553"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory\n\nWhen I did memory failure tests, below panic occurs:\n\npage dumped because: VM_BUG_ON_PAGE(PagePoisoned(page))\nkernel BUG at include/linux/page-flags.h:616!\nOops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 3 PID: 720 Comm: bash Not tainted 6.10.0-rc1-00195-g148743902568 #40\nRIP: 0010:unpoison_memory+0x2f3/0x590\nRSP: 0018:ffffa57fc8787d60 EFLAGS: 00000246\nRAX: 0000000000000037 RBX: 0000000000000009 RCX: ffff9be25fcdc9c8\nRDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff9be25fcdc9c0\nRBP: 0000000000300000 R08: ffffffffb4956f88 R09: 0000000000009ffb\nR10: 0000000000000284 R11: ffffffffb4926fa0 R12: ffffe6b00c000000\nR13: ffff9bdb453dfd00 R14: 0000000000000000 R15: fffffffffffffffe\nFS: 00007f08f04e4740(0000) GS:ffff9be25fcc0000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000564787a30410 CR3: 000000010d4e2000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n unpoison_memory+0x2f3/0x590\n simple_attr_write_xsigned.constprop.0.isra.0+0xb3/0x110\n debugfs_attr_write+0x42/0x60\n full_proxy_write+0x5b/0x80\n vfs_write+0xd5/0x540\n ksys_write+0x64/0xe0\n do_syscall_64+0xb9/0x1d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f08f0314887\nRSP: 002b:00007ffece710078 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f08f0314887\nRDX: 0000000000000009 RSI: 0000564787a30410 RDI: 0000000000000001\nRBP: 0000564787a30410 R08: 000000000000fefe R09: 000000007fffffff\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009\nR13: 00007f08f041b780 R14: 00007f08f0417600 R15: 00007f08f0416a00\n \u003c/TASK\u003e\nModules linked in: hwpoison_inject\n---[ end trace 0000000000000000 ]---\nRIP: 0010:unpoison_memory+0x2f3/0x590\nRSP: 0018:ffffa57fc8787d60 EFLAGS: 00000246\nRAX: 0000000000000037 RBX: 0000000000000009 RCX: ffff9be25fcdc9c8\nRDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff9be25fcdc9c0\nRBP: 0000000000300000 R08: ffffffffb4956f88 R09: 0000000000009ffb\nR10: 0000000000000284 R11: ffffffffb4926fa0 R12: ffffe6b00c000000\nR13: ffff9bdb453dfd00 R14: 0000000000000000 R15: fffffffffffffffe\nFS: 00007f08f04e4740(0000) GS:ffff9be25fcc0000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000564787a30410 CR3: 000000010d4e2000 CR4: 00000000000006f0\nKernel panic - not syncing: Fatal exception\nKernel Offset: 0x31c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)\n---[ end Kernel panic - not syncing: Fatal exception ]---\n\nThe root cause is that unpoison_memory() tries to check the PG_HWPoison\nflags of an uninitialized page. So VM_BUG_ON_PAGE(PagePoisoned(page)) is\ntriggered. This can be reproduced by below steps:\n\n1.Offline memory block:\n\n echo offline \u003e /sys/devices/system/memory/memory12/state\n\n2.Get offlined memory pfn:\n\n page-types -b n -rlN\n\n3.Write pfn to unpoison-pfn\n\n echo \u003cpfn\u003e \u003e /sys/kernel/debug/hwpoison/unpoison-pfn\n\nThis scenario can be identified by pfn_to_online_page() returning NULL. \nAnd ZONE_DEVICE pages are never expected, so we can simply fail if\npfn_to_online_page() == NULL to fix the bug.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-39883"
},
{
"category": "external",
"summary": "RHBZ#2397553",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2397553"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-39883",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-39883"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-39883",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39883"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025092302-CVE-2025-39883-6015@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025092302-CVE-2025-39883-6015@gregkh/T"
}
],
"release_date": "2025-09-23T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"details": "Moderate"
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"title": "kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory"
},
{
"cve": "CVE-2025-39898",
"cwe": {
"id": "CWE-122",
"name": "Heap-based Buffer Overflow"
},
"discovery_date": "2025-10-01T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2400598"
}
],
"notes": [
{
"category": "description",
"text": "No description is available for this CVE.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: e1000e: fix heap overflow in e1000_set_eeprom",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This CVE has been marked as Rejected by the assigning CNA.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-39898"
},
{
"category": "external",
"summary": "RHBZ#2400598",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2400598"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-39898",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-39898"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-39898",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39898"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025100116-CVE-2025-39898-d844@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025100116-CVE-2025-39898-d844@gregkh/T"
}
],
"release_date": "2025-10-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 0.0,
"baseSeverity": "NONE",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: e1000e: fix heap overflow in e1000_set_eeprom"
},
{
"cve": "CVE-2025-39993",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-10-15T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2404121"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rc: fix races with imon_disconnect()\n\nSyzbot reports a KASAN issue as below:\nBUG: KASAN: use-after-free in __create_pipe include/linux/usb.h:1945 [inline]\nBUG: KASAN: use-after-free in send_packet+0xa2d/0xbc0 drivers/media/rc/imon.c:627\nRead of size 4 at addr ffff8880256fb000 by task syz-executor314/4465\n\nCPU: 2 PID: 4465 Comm: syz-executor314 Not tainted 6.0.0-rc1-syzkaller #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\nprint_address_description mm/kasan/report.c:317 [inline]\nprint_report.cold+0x2ba/0x6e9 mm/kasan/report.c:433\nkasan_report+0xb1/0x1e0 mm/kasan/report.c:495\n__create_pipe include/linux/usb.h:1945 [inline]\nsend_packet+0xa2d/0xbc0 drivers/media/rc/imon.c:627\nvfd_write+0x2d9/0x550 drivers/media/rc/imon.c:991\nvfs_write+0x2d7/0xdd0 fs/read_write.c:576\nksys_write+0x127/0x250 fs/read_write.c:631\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe iMON driver improperly releases the usb_device reference in\nimon_disconnect without coordinating with active users of the\ndevice.\n\nSpecifically, the fields usbdev_intf0 and usbdev_intf1 are not\nprotected by the users counter (ictx-\u003eusers). During probe,\nimon_init_intf0 or imon_init_intf1 increments the usb_device\nreference count depending on the interface. However, during\ndisconnect, usb_put_dev is called unconditionally, regardless of\nactual usage.\n\nAs a result, if vfd_write or other operations are still in\nprogress after disconnect, this can lead to a use-after-free of\nthe usb_device pointer.\n\nThread 1 vfd_write Thread 2 imon_disconnect\n ...\n if\n usb_put_dev(ictx-\u003eusbdev_intf0)\n else\n usb_put_dev(ictx-\u003eusbdev_intf1)\n...\nwhile\n send_packet\n if\n pipe = usb_sndintpipe(\n ictx-\u003eusbdev_intf0) UAF\n else\n pipe = usb_sndctrlpipe(\n ictx-\u003eusbdev_intf0, 0) UAF\n\nGuard access to usbdev_intf0 and usbdev_intf1 after disconnect by\nchecking ictx-\u003edisconnected in all writer paths. Add early return\nwith -ENODEV in send_packet(), vfd_write(), lcd_write() and\ndisplay_open() if the device is no longer present.\n\nSet and read ictx-\u003edisconnected under ictx-\u003elock to ensure memory\nsynchronization. Acquire the lock in imon_disconnect() before setting\nthe flag to synchronize with any ongoing operations.\n\nEnsure writers exit early and safely after disconnect before the USB\ncore proceeds with cleanup.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: media: rc: fix races with imon_disconnect()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-39993"
},
{
"category": "external",
"summary": "RHBZ#2404121",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2404121"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-39993",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-39993"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-39993",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39993"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025101527-CVE-2025-39993-caef@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025101527-CVE-2025-39993-caef@gregkh/T"
}
],
"release_date": "2025-10-15T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"category": "workaround",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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{
"category": "impact",
"details": "Moderate"
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"title": "kernel: media: rc: fix races with imon_disconnect()"
},
{
"cve": "CVE-2025-68285",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2025-12-16T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2422801"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free vulnerability was found in the Ceph client session initialization in the Linux kernel. The have_mon_and_osd_map() function checks map epochs without holding the appropriate locks, racing with concurrent map updates that free the old map. This can result in dereferencing freed memory during CephFS or RBD mount operations.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: libceph: fix potential use-after-free in have_mon_and_osd_map()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This race condition occurs during Ceph client session establishment. Exploitation is timing-dependent and requires concurrent map updates during mount, making practical exploitation difficult but not impossible.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-68285"
},
{
"category": "external",
"summary": "RHBZ#2422801",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422801"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-68285",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-68285"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68285",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68285"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025121638-CVE-2025-68285-8339@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025121638-CVE-2025-68285-8339@gregkh/T"
}
],
"release_date": "2025-12-16T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-01-14T00:17:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: libceph: fix potential use-after-free in have_mon_and_osd_map()"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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