{"schema":"threatline.record/2","record":{"id":"CVE-2026-101308","aliases":[],"summary":"TOCTOU race between sound(4) buffer resizing and mmap","details":"When an audio channel's buffer needs to be resized, the sound(4) driver checks that the buffer is not memory-mapped and then drops the channel lock to allocate a new buffer.  An mmap(2) call on another thread can complete during this window, after which the resize path frees the now-mapped buffer without rechecking.\n\nAn unprivileged local user with access to a sound device can exploit this race to trigger a use-after-free in the kernel, potentially escalating privileges.","categories":["Operating systems"],"product":"FreeBSD","vendor":"FreeBSD","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-101308","source_modified_at":"2026-10-15T15:40:12.607Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"FreeBSD","vendor":"FreeBSD","versions":[{"status":"affected","versionType":"release","version":"15.1-RELEASE","lessThan":"p5"},{"status":"affected","versionType":"release","version":"14.5-RELEASE","lessThan":"p2"},{"status":"affected","versionType":"release","version":"14.4-RELEASE","lessThan":"p11"}],"defaultStatus":"unknown"}],"fixed_versions":[],"cvss":5.5,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00074,"percentile":0.00073,"score_date":"2026-10-23"},"published_at":"2026-10-15T07:08:52.619Z","modified_at":"2026-10-15T15:40:12.607Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-101308","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-15T15:40:12.607Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-101308","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:71.sound.asc","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-15T15:40:09.578920Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-15T15:40:12.607Z","content_hash":"9c880bcc083e9612beefe43f031039cfa429c535943cb6c92148068ea6cc2bff"}}