{"id":"CVE-2026-23271","title":"perf: Fix __perf_event_overflow() vs perf_remove_from_context() race","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix __perf_event_overflow() vs perf_remove_from_context() race\n\nMake sure that __perf_event_overflow() runs with IRQs disabled for all\npossible callchains. Specif…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 4df1a45819e50993cb351682a6ae8e7ed2d233a0","Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 4f8d5812337871227bb2c98669a87c306a2f86ef","Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 5c48fdc4b4623533d86e279f51531a7ba212eb87","Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 3f89b61dd504c5b6711de9759e053b082f9abf12","Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < bb190628fe5f2a73ba762a9972ba16c5e895f73e","Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae","Linux 2.6.31"],"published":"2026-03-20","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:45:14.715Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23271","references":[{"url":"https://git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0"},{"url":"https://git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86ef"},{"url":"https://git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87"},{"url":"https://git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12"},{"url":"https://git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73e"},{"url":"https://git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae"}],"tags":["cve.org"],"epss":0.00096,"epssPercentile":0.00807,"ingestedAt":"2026-09-08T15:33:26.993Z","slug":"CVE-2026-23271","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix __perf_event_overflow() vs perf_remove_from_context() race\n\nMake sure that __perf_event_overflow() runs with IRQs disabled for all\npossible callchains. Specifically the software events can end up running\nit with only preemption disabled.\n\nThis opens up a race vs perf_event_exit_event() and friends that will go\nand free various things the overflow path expects to be present, like\nthe BPF program.\n\n## Affected\n\n- `Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 4df1a45819e50993cb351682a6ae8e7ed2d233a0`\n- `Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 4f8d5812337871227bb2c98669a87c306a2f86ef`\n- `Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 5c48fdc4b4623533d86e279f51531a7ba212eb87`\n- `Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < 3f89b61dd504c5b6711de9759e053b082f9abf12`\n- `Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < bb190628fe5f2a73ba762a9972ba16c5e895f73e`\n- `Linux >= 592903cdcbf606a838056bae6d03fc557806c914 < c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae`\n- `Linux 2.6.31`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}