{"id":"CVE-2026-101307","title":"When the PCM sample array needs to grow, the RACK stack doubles a 16-bit allocation counter","summary":"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 in…","severity":"none","cwe":["CWE-122","CWE-787"],"vendor":"FreeBSD","product":"FreeBSD","affected":["FreeBSD >= 15.1-RELEASE < p5"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T07:17:57.890","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101307","references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:70.tcp.asc","label":"secteam@freebsd.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T07:57:27.844Z","slug":"CVE-2026-101307","body":"## Overview\n\nWhen 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.\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":[]}