{"id":"CVE-2025-38565","title":"perf/core: Exit early on perf_mmap() fail","summary":"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 m…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 5ffda7f3ed76ec8defc19d985e33b3b82ba07839","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 9b90a48c7de828a15c7a4fc565d46999c6e22d6b","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < de85e72598d89880a02170a1cbc27b35a7d978a9","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 27d44145bd576bbef9bf6165bcd78128ec3e6cbd","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < f41e9eba77bf97626e04296dc5677d02816d2432","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 92043120a2e992800580855498ab8507e1b22db9","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 163b0d1a209fe0df5476c1df2330ca12b55abf92","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 7ff8521f30c4c2fcd4e88bd7640486602bf8a650","Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 07091aade394f690e7b655578140ef84d0e8d7b0","Linux 4.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:04:06.362645Z"},"published":"2025-08-19","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:12:47.389Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38565","references":[{"url":"https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839"},{"url":"https://git.kernel.org/stable/c/9b90a48c7de828a15c7a4fc565d46999c6e22d6b"},{"url":"https://git.kernel.org/stable/c/de85e72598d89880a02170a1cbc27b35a7d978a9"},{"url":"https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbd"},{"url":"https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432"},{"url":"https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9"},{"url":"https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92"},{"url":"https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650"},{"url":"https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0"}],"tags":["cve.org"],"epss":0.00191,"epssPercentile":0.08773,"ingestedAt":"2026-11-05T22:38:31.993Z","slug":"CVE-2025-38565","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 5ffda7f3ed76ec8defc19d985e33b3b82ba07839`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 9b90a48c7de828a15c7a4fc565d46999c6e22d6b`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < de85e72598d89880a02170a1cbc27b35a7d978a9`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 27d44145bd576bbef9bf6165bcd78128ec3e6cbd`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < f41e9eba77bf97626e04296dc5677d02816d2432`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 92043120a2e992800580855498ab8507e1b22db9`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 163b0d1a209fe0df5476c1df2330ca12b55abf92`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 7ff8521f30c4c2fcd4e88bd7640486602bf8a650`\n- `Linux >= 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb < 07091aade394f690e7b655578140ef84d0e8d7b0`\n- `Linux 4.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}