{
  "cveId": "CVE-2023-53136",
  "url": "https://patchblox.com/security/cve/CVE-2023-53136",
  "summary": "CVE-2023-53136 is fixed in 20 products on 1 platform, first by ALAS2023-2023-148, released March 30, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  af_unix: fix struct pid leaks in OOB support  sy...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  af_unix: fix struct pid leaks in OOB support  syzbot reported struct pid leak [1].  Issue is that queue_oob() calls maybe_add_creds() which potentially holds a reference on a pid.  But skb-\u003Edestructor is not set (either directly or by calling unix_scm_to_skb())  This means that subsequent kfree_skb() or consume_skb() would leak this reference.  In this fix, I chose to fully support scm even for the OOB message.  [1] BUG: memory leak unreferenced object 0xffff8881053e7f80 (size 128): comm \u0022syz-executor242\u0022, pid 5066, jiffies 4294946079 (age 13.220s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [\u003Cffffffff812ae26a\u003E] alloc_pid\u002B0x6a/0x560 kernel/pid.c:180 [\u003Cffffffff812718df\u003E] copy_process\u002B0x169f/0x26c0 kernel/fork.c:2285 [\u003Cffffffff81272b37\u003E] kernel_clone\u002B0xf7/0x610 kernel/fork.c:2684 [\u003Cffffffff812730cc\u003E] __do_sys_clone\u002B0x7c/0xb0 kernel/fork.c:2825 [\u003Cffffffff849ad699\u003E] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [\u003Cffffffff849ad699\u003E] do_syscall_64\u002B0x39/0xb0 arch/x86/entry/common.c:80 [\u003Cffffffff84a0008b\u003E] entry_SYSCALL_64_after_hwframe\u002B0x63/0xcd",
  "published": "2023-03-30T21:11:00Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00194,
  "epssPercentile": 0.09167,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.21-1.45",
      "release": "amzn 2023",
      "fixedVersion": "1.0-0.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53136",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53136",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53136",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53136",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53136",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53136",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}