GHSA-CP5V-2Q38-79VC

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-09-08 15:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path

In do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference via get_pid() and stores it in timer.it.cpu.pid. If the subsequent posix_cpu_timer_set() call fails, the function returns immediately without calling posix_cpu_timer_del() to release the pid reference, causing a leak.

Fix it by calling posix_cpu_timer_del() before the unlock-and-return on the error path, consistent with the other exit paths in the same function.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-64370"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:19Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path\n\nIn do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference\nvia get_pid() and stores it in timer.it.cpu.pid. If the subsequent\nposix_cpu_timer_set() call fails, the function returns immediately\nwithout calling posix_cpu_timer_del() to release the pid reference,\ncausing a leak.\n\nFix it by calling posix_cpu_timer_del() before the unlock-and-return\non the error path, consistent with the other exit paths in the same\nfunction.",
  "id": "GHSA-cp5v-2q38-79vc",
  "modified": "2026-09-08T15:31:27Z",
  "published": "2026-07-25T12:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64370"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7776f9226e99eb49d97492b0b445027cfcb189da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87bd2ad568e15b90d5f7d4bcd70342d05dad649c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a270b1258797f61b61da44f8bfd41a581b5c85b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f06363446c5d043c9a7c008b250040e9de98cf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/afed3cdc1cca133f804fcf57ff228974f424b23a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d605d00085adc3fddf67de01dc2a44aebf1a3fb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5ffc638faf5dc7d9dc85c9a95e10bf97442e0c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb4cec29a78334d09bcfb41c0660cdd62ba05843"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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