{"id":"CVE-2026-68161","revision":null,"records":[{"revision":"4ed18fc8fb60423d9a5c6103ce6d6ce2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68161","aliases":[],"title":"sctp: close UDP tunnel sockets during netns teardown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: close UDP tunnel sockets during netns teardown\n\nproc_sctp_do_udp_port() starts per-net SCTP UDP tunneling sockets when\nnet.sctp.udp_port is set, and stops/restarts them when the sysctl value\nchanges. The netns exit path does not stop these sockets, so a namespace\ncan be torn down while its SCTP UDP tunnel sockets are still installed.\n\nClose the UDP tunnel sockets from sctp_ctrlsock_exit() after unregistering\nthe per-net sysctl table. This prevents new sysctl writes from racing in\nwhile the sockets are being released, and closes the sockets before the\ncontrol socket is destroyed.","state":0,"publishedAt":"2026-08-10T11:59:28.072+00:00","modifiedAt":"2026-10-19T20:58:55.541+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/sctp/protocol.c\"\n ],\n \"versions\": [\n {\n \"version\": \"046c052b475e7119b6a30e3483e2888fc606a2f8\",\n \"lessThan\": \"c29affd44e6769e3073235d4b471d9b501fa8166\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"046c052b475e7119b6a30e3483e2888fc606a2f8\",\n \"lessThan\": \"c6eb2d615210b80339548ab07c0230edaab9a6c7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"046c052b475e7119b6a30e3483e2888fc606a2f8\",\n \"lessThan\": \"8ff78591d309c50a4fdab683b68dd8d512a270dd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"046c052b475e7119b6a30e3483e2888fc606a2f8\",\n \"lessThan\": \"3bf0e349cbb4f975f35eb22753acc346b89c66a0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"046c052b475e7119b6a30e3483e2888fc606a2f8\",\n \"lessThan\": \"37ff9794be48d0caa37687e04d09675f9c849121\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"046c052b475e7119b6a30e3483e2888fc606a2f8\",\n \"lessThan\": \"ffb2bd7ade36ec4da32c46a6eddbf4515316d08c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/sctp/protocol.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.189\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.151\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.101\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.42\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.6\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/c29affd44e6769e3073235d4b471d9b501fa8166","https://git.kernel.org/stable/c/c6eb2d615210b80339548ab07c0230edaab9a6c7","https://git.kernel.org/stable/c/8ff78591d309c50a4fdab683b68dd8d512a270dd","https://git.kernel.org/stable/c/3bf0e349cbb4f975f35eb22753acc346b89c66a0","https://git.kernel.org/stable/c/37ff9794be48d0caa37687e04d09675f9c849121","https://git.kernel.org/stable/c/ffb2bd7ade36ec4da32c46a6eddbf4515316d08c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68161","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68161","identifiers":["CVE-2026-68161"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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