{"id":"CVE-2026-99237","title":"tracing: Hold trace_types_lock when resetting last boot data from readers","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Hold trace_types_lock when resetting last boot data from readers\n\nupdate_last_data_if_empty() is called from tracing_open() with O_TRUNC,\ntracing_read_pipe() a…","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 >= 32dc0042528d385d83bf458e4cf3a49c5110afea < 92b69f6db640dadc0851762ee2e12db99f083cad","Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < d6d991afe775ab7fcf89523a2502b7ca3be56ffd","Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < 1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa","Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < 5a6bd62f09147b49b31fd19d4eba122cb5f941a1","Linux 6.16"],"published":"2026-11-02","updated":"2026-11-03","sourceUpdated":"2026-11-03T19:13:04.997Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99237","references":[{"url":"https://git.kernel.org/stable/c/92b69f6db640dadc0851762ee2e12db99f083cad"},{"url":"https://git.kernel.org/stable/c/d6d991afe775ab7fcf89523a2502b7ca3be56ffd"},{"url":"https://git.kernel.org/stable/c/1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa"},{"url":"https://git.kernel.org/stable/c/5a6bd62f09147b49b31fd19d4eba122cb5f941a1"}],"tags":["cve.org"],"epss":0.0012,"epssPercentile":0.01846,"ingestedAt":"2026-11-05T20:33:06.389Z","slug":"CVE-2026-99237","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Hold trace_types_lock when resetting last boot data from readers\n\nupdate_last_data_if_empty() is called from tracing_open() with O_TRUNC,\ntracing_read_pipe() and tracing_buffers_read() without trace_types_lock.\nTwo readers can both pass the LAST_BOOT test and free module_delta\ntwice, and a module notifier can update module_delta while it is being\nfreed.\n\nTake trace_types_lock in those paths and keep the callers that already\nhold it on an unlocked variant.\n\n## Affected\n\n- `Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < 92b69f6db640dadc0851762ee2e12db99f083cad`\n- `Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < d6d991afe775ab7fcf89523a2502b7ca3be56ffd`\n- `Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < 1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa`\n- `Linux >= 32dc0042528d385d83bf458e4cf3a49c5110afea < 5a6bd62f09147b49b31fd19d4eba122cb5f941a1`\n- `Linux 6.16`\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":[]}