rhsa-2024_0439
Vulnerability from csaf_redhat
Published
2024-01-25 09:43
Modified
2024-09-16 15:46
Summary
Red Hat Security Advisory: kernel-rt security update
Notes
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.
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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe (CVE-2023-2163)
* kernel: use after free in unix_stream_sendpage (CVE-2023-4622)
* kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
* kernel: eBPF: insufficient stack type checks in dynptr (CVE-2023-39191)
* kernel: IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)
* kernel: Race Condition leading to UAF in Unix Socket could happen in sk_receive_queue (BZ#2230094)
* kernel: nfp: use-after-free in area_cache_get() (CVE-2022-3545)
* kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip (CVE-2022-41858)
* kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)
* kernel: NULL pointer dereference in can_rcv_filter (CVE-2023-2166)
* kernel: Slab-out-of-bound read in compare_netdev_and_ip (CVE-2023-2176)
* kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race (CVE-2023-3567)
* kernel: use-after-free in netfilter: nf_tables (CVE-2023-3777)
* kernel: use after free in nft_immediate_deactivate (CVE-2023-4015)
* kernel: A heap out-of-bounds write (CVE-2023-5717)
* hw amd: Return Address Predictor vulnerability leading to information disclosure (CVE-2023-20569)
* kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (CVE-2023-38409)
* kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c (CVE-2023-40283)
* kernel: SEV-ES local priv escalation (CVE-2023-46813)
* kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)
* kernel: NULL pointer dereference in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c (CVE-2023-6679)
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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"text": "A vulnerability was found in area_cache_get in drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c in the Netronome Flow Processor (NFP) driver in the Linux kernel. This flaw allows a manipulation that may lead to a use-after-free issue.",
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},
{
"category": "summary",
"text": "kernel: nfp: use-after-free in area_cache_get()",
"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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{
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{
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"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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{
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"text": "A flaw was found in the Linux kernel. A NULL pointer dereference may occur while a slip driver is in progress to detach in sl_tx_timeout in drivers/net/slip/slip.c. This issue could allow an attacker to crash the system or leak internal kernel information.",
"title": "Vulnerability description"
},
{
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"text": "kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip",
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},
{
"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.",
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"title": "kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip"
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{
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"text": "A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.",
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{
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"text": "kernel: use-after-free in smb2_is_status_io_timeout()",
"title": "Vulnerability summary"
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{
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"text": "Because analysis indicates that this issue will only cause momentary interruptions to connections, Red Hat rates the impact of this flaw as Low.",
"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.",
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{
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"text": "kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe",
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"text": "The Red Hat Enterprise Linux 9.3 not affected, because the required patch applied before this CVE creation. For the Red Hat Enterprise Linux 9 before version 9.3 required fixes applied too.",
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"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.",
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},
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},
{
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"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-3777",
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{
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{
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"text": "A use-after-free flaw was found in the Linux kernel\u0027s netfilter: nf_tables component, which can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can unbind the chain and objects can be deactivated but used later.",
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"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace and on non-containerized deployments of Red Hat Enterprise Linux, you can disable user namespaces by setting user.max_user_namespaces to 0:\n\n# echo \"user.max_user_namespaces=0\" \u003e /etc/sysctl.d/userns.conf\n# sysctl -p /etc/sysctl.d/userns.conf\n\nOn containerized deployments such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.",
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},
{
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"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.",
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},
{
"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237752"
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"summary": "https://www.cve.org/CVERecord?id=CVE-2023-4015",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-4015"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-4015",
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{
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"name": "Use After Free"
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"ids": [
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],
"notes": [
{
"category": "description",
"text": "A use-after-free flaw was found in the Linux kernel\u0027s af_unix component that allows local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer\u0027s recv queue without locking the queue. This issue leads to a race condition where the unix_stream_sendpage() function could access a skb that is being released by garbage collection, resulting in a use-after-free issue.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: use after free in unix_stream_sendpage",
"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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{
"category": "self",
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"url": "https://access.redhat.com/security/cve/CVE-2023-4622"
},
{
"category": "external",
"summary": "RHBZ#2237760",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237760"
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2023-4622"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-4622",
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{
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"text": "A use-after-free flaw was found in the Linux kernel\u0027s net/sched: sch_hfsc (HFSC qdisc traffic control) component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSC_FSC flag set, has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free issue.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: sch_hfsc UAF",
"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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{
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{
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{
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: A heap out-of-bounds write when function perf_read_group is called and sibling_list is smaller than its child\u0027s sibling_list",
"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.",
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"title": "kernel: A heap out-of-bounds write when function perf_read_group is called and sibling_list is smaller than its child\u0027s sibling_list"
},
{
"acknowledgments": [
{
"names": [
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"organization": "(IceSword Lab)"
}
],
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"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
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"discovery_date": "2023-12-11T00:00:00+00:00",
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{
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"text": "A null pointer dereference vulnerability was found in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c in the Digital Phase Locked Loop (DPLL) subsystem in the Linux kernel. This issue could be exploited to trigger a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: NULL pointer dereference in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c",
"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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{
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"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.",
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},
{
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},
{
"category": "external",
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