{"id":"CVE-2026-68161","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68161","summary":"sctp: close UDP tunnel sockets during netns teardown","details":"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.","published":"2026-08-10T11:59:28.072Z","modified":"2026-08-14T04:03:27.105552462Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.151"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/37ff9794be48d0caa37687e04d09675f9c849121"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3bf0e349cbb4f975f35eb22753acc346b89c66a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ff78591d309c50a4fdab683b68dd8d512a270dd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c6eb2d615210b80339548ab07c0230edaab9a6c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ffb2bd7ade36ec4da32c46a6eddbf4515316d08c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68161.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68161"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:03:27.105552462Z"}}