{"schemaVersion":3,"id":"CVE-2026-101307","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"When the PCM sample array needs to grow, the RACK stack doubles a 16-bit allocation counter.  Repeated doublings caused the counter to wrap to zero, resulting in a near-zero-length allocation followed by a copy of the existing samples into the undersized buffer.  A remote peer can trigger the expansion by sending a sufficient number of ACKs on an established connection.\n\nA remote attacker who can establish a TCP connection to a system using the RACK stack can trigger an out-of-bounds write of approximately 512 KB in the kernel heap possibly resulting in a kernel panic.","dates":{"published":"2026-10-15T07:05:02.295Z","modified":"2026-10-15T16:48:11.023Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.1,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00308,"percentile":0.22157,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.00169,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00308,"percentile":0.22157}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.00169,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00308,"percentile":0.22157}]},"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-122","name":"Heap-based Buffer Overflow","description":"A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/122.html"},{"id":"CWE-787","name":"Out-of-bounds Write","description":"The product writes data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/787.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":"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 | 15.1 | 15.1:p1 | 15.1:p2 | 15.1:p3 | 15.1:p4","eol":{"isEol":false,"eolDate":"2027-03-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"15.1","label":"releng/15.1","eolFrom":"2027-03-31T00:00:00.000Z","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-26:70.tcp.asc","label":"security.freebsd.org/advisories/FreeBSD-SA-26:70.tcp.asc","hostname":"security.freebsd.org","tags":["Vendor Advisory","Mitigation","Patch"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-15T07:05:02.295Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-15T16:48:11.023Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T13:06:59.898Z","stale":false,"partial":false}}