{"id":"CVE-2026-101308","title":"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","summary":"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 win…","severity":"none","cwe":["CWE-367"],"vendor":"FreeBSD","product":"FreeBSD","affected":["FreeBSD >= 15.1-RELEASE < p5","FreeBSD >= 14.5-RELEASE < p2","FreeBSD >= 14.4-RELEASE < p11"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T07:17:58.007","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101308","references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:71.sound.asc","label":"secteam@freebsd.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T07:57:27.844Z","slug":"CVE-2026-101308","body":"## Overview\n\nWhen 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.\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":[]}