{"id":"CVE-2026-68161","title":"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/restart…","summary":"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/restart…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 046c052b475e7119b6a30e3483e2888fc606a2f8 < c29affd44e6769e3073235d4b471d9b501fa8166","Linux >= 046c052b475e7119b6a30e3483e2888fc606a2f8 < c6eb2d615210b80339548ab07c0230edaab9a6c7","Linux >= 046c052b475e7119b6a30e3483e2888fc606a2f8 < 8ff78591d309c50a4fdab683b68dd8d512a270dd","Linux >= 046c052b475e7119b6a30e3483e2888fc606a2f8 < 3bf0e349cbb4f975f35eb22753acc346b89c66a0","Linux >= 046c052b475e7119b6a30e3483e2888fc606a2f8 < 37ff9794be48d0caa37687e04d09675f9c849121","Linux >= 046c052b475e7119b6a30e3483e2888fc606a2f8 < ffb2bd7ade36ec4da32c46a6eddbf4515316d08c","Linux 5.11"],"published":"2026-08-10","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:35.977","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-68161","references":[{"url":"https://git.kernel.org/stable/c/37ff9794be48d0caa37687e04d09675f9c849121","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3bf0e349cbb4f975f35eb22753acc346b89c66a0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8ff78591d309c50a4fdab683b68dd8d512a270dd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c29affd44e6769e3073235d4b471d9b501fa8166","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c6eb2d615210b80339548ab07c0230edaab9a6c7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ffb2bd7ade36ec4da32c46a6eddbf4515316d08c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68161.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-68161"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513179"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68161"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68161"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081004-CVE-2026-68161-d9d6@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00682,"epssPercentile":0.5227,"ingestedAt":"2026-10-03T11:43:42.116Z","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T15:45:23.310568Z"},"cwe":["CWE-772"],"scores":{"nvd":9.8,"vendor":7,"cna":9.8},"slug":"CVE-2026-68161","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68161.json)","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}