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        "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.\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": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669)\n\n* kernel: RDMA/umem: Fix double dma_buf_unpin in failure path (CVE-2026-43128)\n\n* kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)\n\n* kernel: dlm: validate length in dlm_search_rsb_tree (CVE-2026-43125)\n\n* kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)\n\n* kernel: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows (CVE-2026-43501)\n\n* kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop (CVE-2026-46090)\n\n* kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181)\n\n* kernel: exit: prevent preemption of oopsing TASK_DEAD task (CVE-2026-46173)\n\nBug Fix(es) and Enhancement(s):\n\n* [rhel-9] WARNING: possible recursive locking detected - vmd_enable_domain+0x757/0x910 (JIRA:RHEL-174467)\n\nFor 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.",
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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": "Release of Invalid Pointer or Reference"
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          "text": "2461503"
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          "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"
        },
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          "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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          "text": "A flaw was found in the Linux kernel\u0027s RDMA/umem subsystem. A memory management error, specifically a double unpin of a `dma_buf`, can occur in a failure path during `dma_buf` pinning operations. This vulnerability could lead to system instability or a crash, resulting in a Denial of Service (DoS).",
          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          "text": "kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing",
          "title": "Vulnerability summary"
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        {
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          "text": "ALSA USB audio could write past the silent URB transfer buffer when implicit feedback stream sizing was inconsistent, causing a constrained kernel buffer overwrite with likely crash/DoS impact. Exploitation requires a specific USB audio device/configuration.",
          "title": "Statement"
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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": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43279"
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        {
          "category": "external",
          "summary": "RHBZ#2467215",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467215"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43279",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43279"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43279",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43279"
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          "url": "https://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43279-4530@gregkh/T"
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      "release_date": "2026-05-06T00:00:00+00:00",
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43501"
        },
        {
          "category": "external",
          "summary": "RHBZ#2480457",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480457"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43501",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43501"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43501",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43501"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026052159-CVE-2026-43501-63a6@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026052159-CVE-2026-43501-63a6@gregkh/T"
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      "release_date": "2026-05-21T00:00:00+00:00",
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          "date": "2026-07-01T00:20:07+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": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46181"
        },
        {
          "category": "external",
          "summary": "RHBZ#2482532",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482532"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46181",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46181"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46181",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46181"
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        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026052829-CVE-2026-46181-ecff@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026052829-CVE-2026-46181-ecff@gregkh/T"
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