{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-101307","sourceIdentifier":"secteam@freebsd.org","published":"2026-10-15T07:17:57.890","lastModified":"2026-11-09T15:17:04.623","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"secteam@freebsd.org","affectedData":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","modules":["tcp"],"versions":[{"version":"15.1-RELEASE","lessThan":"p5","versionType":"release","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.2},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-15T15:31:46.531780Z","id":"CVE-2026-101307","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"secteam@freebsd.org","type":"Secondary","description":[{"lang":"en","value":"CWE-122"},{"lang":"en","value":"CWE-787"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:*","matchCriteriaId":"BD327D43-A2DC-49B5-A578-D2116E1E12F3"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:*","matchCriteriaId":"E379873C-DA04-4EAA-ABF6-EB87B4B471A8"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:*","matchCriteriaId":"044A3D39-A2AF-499C-8434-0A07B5854661"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p3:*:*:*:*:*:*","matchCriteriaId":"C75C73C4-ED12-44D9-85EF-A0388D9ECFA2"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:15.1:p4:*:*:*:*:*:*","matchCriteriaId":"692AEF98-7AFF-46C2-B2AD-833CF645A604"}]}]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:70.tcp.asc","source":"secteam@freebsd.org","tags":["Mitigation","Patch","Vendor Advisory"]}]}}