{"schema":"threatline.record/2","record":{"id":"CVE-2026-99158","aliases":[],"summary":"ring-buffer: Fix false warning in ring_buffer_map_get_reader()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Fix false warning in ring_buffer_map_get_reader()\n\nThe mmap reader can warn when it catches up with a writer that is still\ncommitting events. rb_get_reader_page() returns NULL in this case, but\nring_buffer_map_get_reader() treats that result as an error.\n\nThe initial rb_per_cpu_empty() check filters out an empty buffer, but it\ndoes not guarantee that the next reader page has committed data. Writers\ndo not take reader_lock and can advance commit_page before publishing the\ncommitted length on the new page. rb_get_reader_page() can swap to that\npage, catch up with the writer and return NULL.\n\nHandle NULL through the existing no-data exit without warning. Remove the\ncaller's reader_page == commit_page check as well, since the reader-page\nhelper already handles that case. The existing metadata update and return\npath remain in place.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99158","source_modified_at":"2026-10-28T10:35:11.848Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"Linux","vendor":"Linux","versions":[{"version":"117c39200d9d760cbd5944bb89efb7b9c51965aa","lessThan":"029770f5badedc0f0ff85fc45e24785cbbee4a67","status":"affected","versionType":"git"},{"version":"117c39200d9d760cbd5944bb89efb7b9c51965aa","lessThan":"68e6ab180cfb6dfa79652f41ed7899a6d4cf5438","status":"affected","versionType":"git"},{"version":"117c39200d9d760cbd5944bb89efb7b9c51965aa","lessThan":"89bab1dba8a0167ef0d819e0f55b6bafa038e87f","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99158","source_modified_at":"2026-10-28T10:35:11.848Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.10","status":"affected"},{"version":"0","lessThan":"6.10","status":"unaffected","versionType":"semver"},{"version":"6.18.59","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.13","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99158","source_modified_at":"2026-10-28T10:35:11.848Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"029770f5badedc0f0ff85fc45e24785cbbee4a67","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99158","source_modified_at":"2026-10-28T10:35:11.848Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"68e6ab180cfb6dfa79652f41ed7899a6d4cf5438","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99158","source_modified_at":"2026-10-28T10:35:11.848Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"89bab1dba8a0167ef0d819e0f55b6bafa038e87f","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T10:35:11.848Z","modified_at":"2026-10-28T10:35:11.848Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99158","fetched_at":"2026-10-28T15:55:58.673066Z","source_modified_at":"2026-10-28T10:35:11.848Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/029770f5badedc0f0ff85fc45e24785cbbee4a67"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/68e6ab180cfb6dfa79652f41ed7899a6d4cf5438"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/89bab1dba8a0167ef0d819e0f55b6bafa038e87f"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-28T10:35:11.848Z","content_hash":"9e4d6b720312f8ac296e19b323186759eb13f84c9ace9eff6b8fa7dabdc218fd"}}