{
  "cveId": "CVE-2026-53389",
  "url": "https://patchblox.com/security/cve/CVE-2026-53389",
  "summary": "CVE-2026-53389 is fixed in 20 products on 1 platform, first by ALAS2023-2026-1969, released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net/tcp-ao: fix use-after-free of key in del_asy...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/tcp-ao: fix use-after-free of key in del_async path  In tcp_ao_delete_key(), the del_async path skips the current_key and rnext_key validity checks present in the synchronous path, assuming these pointers are always NULL on LISTEN sockets.  However, if a key was added with set_current=1/set_rnext=1 while the socket was in CLOSE state, current_key and rnext_key will be non-NULL after listen() transitions the socket to LISTEN.  When such a key is deleted with del_async=1, hlist_del_rcu() and call_rcu() free the key without clearing the dangling pointers. After the RCU grace period, getsockopt(TCP_AO_INFO) dereferences current_key-\u003Esndid and rnext_key-\u003Ercvid from freed slab memory.  Clear current_key and rnext_key in the del_async path when they reference the key being deleted.",
  "published": "2026-07-19T12:16:49Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00132,
  "epssPercentile": 0.02789,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.38-73.137",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.95-1",
      "fix": "DEBIAN-CVE-2026-53389",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53389",
      "released": "2026-07-20T12:58:36Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.3-1",
      "fix": "DEBIAN-CVE-2026-53389",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53389",
      "released": "2026-07-20T12:58:36Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
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      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
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      "fixedVersion": "1:6.18.38-73.137.amzn2023",
      "fix": "ALAS2023-2026-1969",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1969",
      "released": "2026-07-20T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}