CVE-2025-38565 (GCVE-0-2025-38565)
Vulnerability from cvelistv5
Published
2025-08-19 17:02
Modified
2025-08-28 14:43
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b90a48c7de828a15c7a4fc565d46999c6e22d6b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de85e72598d89880a02170a1cbc27b35a7d978a9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432
Impacted products
Vendor Product Version
Linux Linux Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
Version: 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb
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{
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          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-28T14:43:49.907Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38565",
    "datePublished": "2025-08-19T17:02:41.700Z",
    "dateReserved": "2025-04-16T04:51:24.025Z",
    "dateUpdated": "2025-08-28T14:43:49.907Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38565\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-19T17:15:33.077\",\"lastModified\":\"2025-08-28T15:15:53.333\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: perf/core: Salida anticipada en caso de fallo de perf_mmap(). Cuando perf_mmap() no asigna un b\u00fafer, sigue invocando la devoluci\u00f3n de llamada event_mapped() del evento relacionado. En X86, esto podr\u00eda aumentar el contador de referencias perf_rdpmc_allowed. Sin embargo, esto no se puede revertir, ya que perf_mmap_close() nunca se llama en este caso, lo que provoca otra fuga del recuento de referencias. Para evitarlo, se debe regresar anticipadamente en caso de fallo.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b90a48c7de828a15c7a4fc565d46999c6e22d6b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de85e72598d89880a02170a1cbc27b35a7d978a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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