{"schemaVersion":3,"id":"CVE-2026-101308","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-10-15T07:08:52.619Z","modified":"2026-10-15T15:40:12.607Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00074,"percentile":0.00073,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.00106,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00074,"percentile":0.00073}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.00106,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00074,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00074,"percentile":0.00073}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition","description":"The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/367.html"}],"affected":[{"vendor":"freebsd","product":"freebsd","name":"freebsd","label":"freebsd","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 15.1-RELEASE, < p5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 14.5-RELEASE, < p2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 14.4-RELEASE, < p11","noFixRecorded":false,"fixedIn":null},{"text":"14.4","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p1","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p10","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p2","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p3","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p4","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p5","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p6","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p7","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p8","noFixRecorded":false,"fixedIn":null},{"text":"14.4:p9","noFixRecorded":false,"fixedIn":null},{"text":"14.5","noFixRecorded":false,"fixedIn":null},{"text":"14.5:p1","noFixRecorded":false,"fixedIn":null},{"text":"15.1","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p1","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p2","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p3","noFixRecorded":false,"fixedIn":null},{"text":"15.1:p4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.1-RELEASE, < p5 | ≥ 14.5-RELEASE, < p2 | ≥ 14.4-RELEASE, < p11 | 14.4 | 14.4:p1 | 14.4:p10 | 14.4:p2 | 14.4:p3 | 14.4:p4 | 14.4:p5 | 14.4:p6 | 14.4:p7 | 14.4:p8 | 14.4:p9 | 14.5 | 14.5:p1 | 15.1 | 15.1:p1 | 15.1:p2 | 15.1:p3 | 15.1:p4","eol":{"isEol":false,"eolDate":"2026-12-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"14.4","label":"releng/14.4","eolFrom":"2026-12-31T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":null},"product":{"name":"freebsd","label":"FreeBSD","category":"os"}},"hubHref":"/vendor/freebsd/freebsd"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:71.sound.asc","label":"security.freebsd.org/advisories/FreeBSD-SA-26:71.sound.asc","hostname":"security.freebsd.org","tags":["Vendor Advisory","Patch"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-15T07:08:52.619Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-15T15:40:12.607Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T02:10:38.379Z","stale":false,"partial":false}}