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CVE-2025-38565

Full vulnerability record from the local CVENow database.

Description

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.

Severity
HIGH
CVSS score
7.8 (v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-08-19 17:15:33.077000
Last modified
2026-11-05 22:17:18.717000
View original CVE JSON 
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  "id": "CVE-2025-38565",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-08-19T17:15:33.077",
  "lastModified": "2026-11-05T22:17:18.717",
  "vulnStatus": "Analyzed",
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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."
    },
    {
      "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 búfer, sigue invocando la devolución de llamada event_mapped() del evento relacionado. En X86, esto podría 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."
    }
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