{"id":"CVE-2026-101303","state":"PUBLISHED","title":"IPv6 UDP sendto(2) bypasses jail loopback restriction","description":"The IPv6 UDP send path for unconnected sockets did not apply the jail policy of rewriting a loopback destination address to the jail's primary IPv6 address.\n\nA process in a classic (non-VNET) jail can send UDP datagrams to services listening on the host's IPv6 loopback address, bypassing jail network isolation.","publishedAt":"2026-10-15T06:58:55.833Z","updatedAt":"2026-10-16T18:36:07.211Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","source":"CISA-ADP"},"assigner":"freebsd","products":["FreeBSD FreeBSD"],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"15.1-RELEASE","status":"affected","lessThan":"p4","versionType":"release"},{"version":"15.0-RELEASE","status":"affected","lessThan":"p14","versionType":"release"},{"version":"14.5-RELEASE","status":"affected","lessThan":"p1","versionType":"release"},{"version":"14.4-RELEASE","status":"affected","lessThan":"p10","versionType":"release"}],"modules":["udp"]}],"references":["https://security.freebsd.org/advisories/FreeBSD-SA-26:69.udp.asc"],"weaknesses":["CWE-941"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101303.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101303","state":"PUBLISHED","datePublished":"2026-10-15T06:58:55.833Z","dateUpdated":"2026-10-16T18:36:07.211Z","assignerShortName":"freebsd","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateReserved":"2026-09-28T13:33:02.323Z"},"containers":{"cna":{"title":"IPv6 UDP sendto(2) bypasses jail loopback restriction","descriptions":[{"lang":"en","value":"The IPv6 UDP send path for unconnected sockets did not apply the jail policy of rewriting a loopback destination address to the jail's primary IPv6 address.\n\nA process in a classic (non-VNET) jail can send UDP datagrams to services listening on the host's IPv6 loopback address, bypassing jail network isolation."}],"affected":[{"vendor":"FreeBSD","product":"FreeBSD","defaultStatus":"unknown","versions":[{"version":"15.1-RELEASE","status":"affected","lessThan":"p4","versionType":"release"},{"version":"15.0-RELEASE","status":"affected","lessThan":"p14","versionType":"release"},{"version":"14.5-RELEASE","status":"affected","lessThan":"p1","versionType":"release"},{"version":"14.4-RELEASE","status":"affected","lessThan":"p10","versionType":"release"}],"modules":["udp"]}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:69.udp.asc","tags":["vendor-advisory"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-941","description":"CWE-941: Incorrectly Specified Destination in a Communication Channel","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"freebsd","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateUpdated":"2026-10-15T06:58:55.833Z"},"datePublic":"2026-09-29T20:30:00.000Z","credits":[{"lang":"en","type":"finder","value":"Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai"}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-16T18:35:57.806852Z","id":"CVE-2026-101303","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:36:07.211Z"}}]}}}