ghsa-j97q-xq86-pq24
Vulnerability from github
Published
2025-08-19 18:31
Modified
2025-08-28 15:30
Details

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

perf/core: Exit early on perf_mmap() fail

When perf_mmap() fails to allocate a buffer, it still invokes the event_mapped() callback of the related event. On X86 this might increase the perf_rdpmc_allowed reference counter. But nothing undoes this as perf_mmap_close() is never called in this case, which causes another reference count leak.

Return early on failure to prevent that.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38565"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Exit early on perf_mmap() fail\n\nWhen perf_mmap() fails to allocate a buffer, it still invokes the\nevent_mapped() callback of the related event. On X86 this might increase\nthe perf_rdpmc_allowed reference counter. But nothing undoes this as\nperf_mmap_close() is never called in this case, which causes another\nreference count leak.\n\nReturn early on failure to prevent that.",
  "id": "GHSA-j97q-xq86-pq24",
  "modified": "2025-08-28T15:30:38Z",
  "published": "2025-08-19T18:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38565"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b90a48c7de828a15c7a4fc565d46999c6e22d6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de85e72598d89880a02170a1cbc27b35a7d978a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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