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        "text": "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.\n\nRed 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.",
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        "text": "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": "Out-of-bounds Read"
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      "discovery_date": "2026-01-14T00:00:00+00:00",
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          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: make decode_pool() more resilient against corrupted osdmaps\n\nIf the osdmap is (maliciously) corrupted such that the encoded length\nof ceph_pg_pool envelope is less than what is expected for a particular\nencoding version, out-of-bounds reads may ensue because the only bounds\ncheck that is there is based on that length value.\n\nThis patch adds explicit bounds checks for each field that is decoded\nor skipped.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: libceph: make decode_pool() more resilient against corrupted osdmaps",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The Ceph client could perform out-of-bounds reads when decoding a corrupted or maliciously crafted osdmap, because the parser trusted length fields without validating each decoded or skipped element. This allows a remote Ceph peer to crash the kernel and cause a denial of service.\nAlthough this issue is triggered over an authenticated Ceph connection, the attack direction is from the server side (OSD/monitor) to the client. Any compromised or malfunctioning Ceph node can provide a malformed osdmap that is parsed in the kernel, breaking Ceph\u2019s security model which assumes that no cluster component should be able to crash or compromise a client, even over an authorized channel.",
          "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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      "title": "kernel: libceph: make decode_pool() more resilient against corrupted osdmaps"
    },
    {
      "cve": "CVE-2026-22984",
      "discovery_date": "2026-01-23T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2432389"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in handle_auth_done()\n\nPerform an explicit bounds check on payload_len to avoid a possible\nout-of-bounds access in the callout.\n\n[ idryomov: changelog ]",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "An out-of-bounds read can occur in libceph messenger v2 during AUTH_DONE handling when payload_len is taken from the wire but the message buffer is not validated to actually contain that many bytes. A malicious or compromised Ceph peer can send a truncated message to reliably crash the kernel (network-triggered 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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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-22984"
        },
        {
          "category": "external",
          "summary": "RHBZ#2432389",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2432389"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-22984",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-22984"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-22984",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22984"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026012349-CVE-2026-22984-001c@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026012349-CVE-2026-22984-001c@gregkh/T"
        }
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      "release_date": "2026-01-23T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-07-06T14:31:32+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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            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
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          "category": "impact",
          "details": "Moderate"
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      "title": "kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done()"
    },
    {
      "cve": "CVE-2026-22990",
      "cwe": {
        "id": "CWE-617",
        "name": "Reachable Assertion"
      },
      "discovery_date": "2026-01-23T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2432400"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: replace overzealous BUG_ON in osdmap_apply_incremental()\n\nIf the osdmap is (maliciously) corrupted such that the incremental\nosdmap epoch is different from what is expected, there is no need to\nBUG.  Instead, just declare the incremental osdmap to be invalid.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is a reachable kernel BUG triggered by malformed (or maliciously corrupted) Ceph incremental OSD map data: an unexpected epoch value could hit a BUG_ON() and panic the kernel. The trigger is received over the Ceph protocol in established Ceph sessions (i.e., within the trusted/authorized cluster communication model), but it breaks that model by allowing a peer to cause a hard host crash.",
          "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://access.redhat.com/security/cve/CVE-2026-22990"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-22990"
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22990"
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        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026012351-CVE-2026-22990-a62e@gregkh/T",
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          "date": "2026-07-06T14:31:32+00:00",
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      "title": "kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental()"
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      "cve": "CVE-2026-23455",
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        "id": "CWE-125",
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          "text": "2454810"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s netfilter subsystem, specifically within the `nf_conntrack_h323` module. This vulnerability occurs in the `DecodeQ931()` function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value being passed to a subsequent function, leading to an out-of-bounds read. This could allow an attacker to cause a denial of service or potentially disclose sensitive information.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()",
          "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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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-23455"
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23455"
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          "summary": "https://lore.kernel.org/linux-cve-announce/2026040317-CVE-2026-23455-f045@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026040317-CVE-2026-23455-f045@gregkh/T"
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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      "title": "kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()"
    },
    {
      "cve": "CVE-2026-31408",
      "cwe": {
        "id": "CWE-911",
        "name": "Improper Update of Reference Count"
      },
      "discovery_date": "2026-04-06T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2455334"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Bluetooth SCO (Synchronous Connection-Oriented) protocol implementation. The `sco_recv_frame()` function fails to properly hold a reference to a socket after releasing a lock. This oversight allows a concurrent operation to free the socket while it is still being accessed, leading to a use-after-free vulnerability. A local attacker could potentially exploit this to cause memory corruption or a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Under `sco_conn_lock`, the code read `conn-\u003esk` then dropped the lock without `sco_sock_hold()`, so `close()` could race and free the socket before `sk-\u003esk_state` use. The fix mirrors other SCO helpers. Adjacent Bluetooth is involved; impact is UAF and likely crash.",
          "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://access.redhat.com/security/cve/CVE-2026-31408"
        },
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455334"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-31408"
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31408"
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          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026040629-CVE-2026-31408-9f0f@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026040629-CVE-2026-31408-9f0f@gregkh/T"
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          "details": "Moderate"
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      "title": "kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold"
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    {
      "cve": "CVE-2026-31669",
      "cwe": {
        "id": "CWE-763",
        "name": "Release of Invalid Pointer or Reference"
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      "discovery_date": "2026-04-24T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2461503"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Multipath TCP (MPTCP) implementation. Due to incorrect memory allocation for IPv6 subflow child sockets, a use-after-free vulnerability exists. A remote attacker could exploit this by triggering concurrent lookups in the kernel\u0027s hash table, potentially leading to a denial of service or arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: mptcp: fix slab-use-after-free in __inet_lookup_established",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A slab use after free can occur in the MPTCP IPv6 subflow path because tcpv6_prot_override may end up with a NULL slab cache pointer and child sockets are then allocated from a non RCU safe kmalloc cache. Lockless ehash lookups rely on SLAB_TYPESAFE_BY_RCU for socket memory stability under rcu_read_lock. When the affected sockets are freed without SOCK_RCU_FREE the memory can be reused immediately and a concurrent __inet_lookup_established lookup can access freed memory. This is at least a denial of service via kernel crash and it is a memory corruption class issue that may allow confidentiality or integrity impact in a worst case scenario. The issue can be network reachable via MPTCP over IPv6, but there is no known attack scenario for now. There is no confirmed practical trigger scenario under default configurations. It appears to require specific non-default preconditions (MPTCP/IPv6 runtime conditions and vulnerable child socket creation paths) that are not known to be reachable by default, so this is the reason to keep this one \"Moderate\" impact level.",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-31669"
        },
        {
          "category": "external",
          "summary": "RHBZ#2461503",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461503"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-31669",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-31669"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31669",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31669"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026042406-CVE-2026-31669-0e0d@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026042406-CVE-2026-31669-0e0d@gregkh/T"
        }
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      "release_date": "2026-04-24T00:00:00+00:00",
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          "date": "2026-07-06T14:31:32+00:00",
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            "baseScore": 7.5,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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      "title": "kernel: mptcp: fix slab-use-after-free in __inet_lookup_established"
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    {
      "cve": "CVE-2026-43198",
      "cwe": {
        "id": "CWE-821",
        "name": "Incorrect Synchronization"
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      "discovery_date": "2026-05-06T00:00:00+00:00",
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2467228"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel. A race condition exists in the TCP (Transmission Control Protocol) IPv6 (Internet Protocol version 6) socket handling, specifically within the tcp_v6_syn_recv_sock() function. This occurs because a child socket becomes visible in the TCP hash table before its IPv6-specific information is fully initialized. A remote attacker could potentially exploit this timing window, leading to an unstable system state or unexpected behavior, which may result in a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()",
          "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": "external",
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      "title": "kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()"
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      "cve": "CVE-2026-43329",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
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          "text": "2468124"
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          "category": "description",
          "text": "A flaw was found in the Netfilter flowtable component of the Linux kernel. This vulnerability occurs because the system does not strictly check the maximum number of hardware offload actions for IPv6, allowing it to process more actions than supported. This could potentially lead to system instability or a denial of service (DoS) condition, where the affected system becomes unresponsive.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: netfilter: flowtable: strictly check for maximum number of actions",
          "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": "impact",
          "details": "Important"
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      "title": "kernel: netfilter: flowtable: strictly check for maximum number of actions"
    },
    {
      "cve": "CVE-2026-45852",
      "discovery_date": "2026-05-27T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2482166"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Remote Direct Memory Access (RDMA) subsystem, specifically within the `rxe` driver. An error in the `rxe_srq_from_init` function\u0027s memory management can lead to a double free vulnerability. This occurs when an attempt to copy data to user space fails, causing the same memory region to be freed twice. A local attacker could potentially exploit this flaw to cause a denial of service (DoS) by crashing the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: RDMA/rxe: Fix double free in rxe_srq_from_init",
          "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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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-45852"
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45852"
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          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026052708-CVE-2026-45852-fcf9@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026052708-CVE-2026-45852-fcf9@gregkh/T"
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          "date": "2026-07-06T14:31:32+00:00",
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            "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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          "details": "Important"
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      "title": "kernel: RDMA/rxe: Fix double free in rxe_srq_from_init"
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    {
      "cve": "CVE-2026-46090",
      "cwe": {
        "id": "CWE-364",
        "name": "Signal Handler Race Condition"
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      "discovery_date": "2026-05-27T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2481980"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s ALSA (Advanced Linux Sound Architecture) aloop driver. This Use-After-Free (UAF) vulnerability occurs when loopback_check_format() stops the capture side during a format change, while a concurrent close operation detaches or frees the runtime. An attacker could potentially exploit this to cause a system crash or achieve arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46090"
        },
        {
          "category": "external",
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46090",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46090"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46090",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46090"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026052702-CVE-2026-46090-1211@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026052702-CVE-2026-46090-1211@gregkh/T"
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          "category": "vendor_fix",
          "date": "2026-07-06T14:31:32+00:00",
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        "id": "CWE-366",
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s RDMA/mlx4 component. This vulnerability arises from the incorrect use of Read-Copy Update (RCU) in the `mlx4_srq_event()` function. An attacker could potentially trigger an event before the `srq` object is fully initialized, leading to a system crash. This could result in a Denial of Service (DoS) for the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()",
          "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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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46181"
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          "category": "external",
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          "url": "https://lore.kernel.org/linux-cve-announce/2026052829-CVE-2026-46181-ecff@gregkh/T"
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          "url": "https://access.redhat.com/errata/RHSA-2026:35896"
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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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      "threats": [
        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()"
    }
  ]
}