{"id":"CVE-2026-101307","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-101307","generatedAt":"2026-10-27T23:45:11.112Z","title":"A remote peer can trigger the expansion by sending a sufficient number of ACKs on an established connection.","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.","published":"2026-10-15T07:17:58.000Z","lastModified":"2026-10-20T00:21:51.000Z","status":"Analyzed","sourceIdentifier":"secteam@freebsd.org","cvss":{"version":"4.0","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/M"},"cwe":["CWE-122","CWE-787"],"affected":["freebsd/freebsd"],"epss":{"score":0.00313,"percentile":0.24021,"date":"2026-10-26","history":[{"date":"2026-10-15","score":0.00169,"percentile":0.05764}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-15T18:30:14.000Z","detail":{"from":null,"score":"8.2","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 8.2 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-15T07:17:58.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-15T07:17:57.890Z"},"summary":"New CVE, high severity (CVSS 8.2)."}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:70.tcp.asc","tags":["Mitigation","Patch","Vendor Advisory"],"source":"secteam@freebsd.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-101307","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}