{"id":"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.","modified":"2026-08-18T03:31:21.200729108Z","published":"2026-08-10T11:59:28.072Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68161.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"046c052b475e7119b6a30e3483e2888fc606a2f8"},{"fixed":"c6eb2d615210b80339548ab07c0230edaab9a6c7"},{"fixed":"8ff78591d309c50a4fdab683b68dd8d512a270dd"},{"fixed":"3bf0e349cbb4f975f35eb22753acc346b89c66a0"},{"fixed":"37ff9794be48d0caa37687e04d09675f9c849121"},{"fixed":"ffb2bd7ade36ec4da32c46a6eddbf4515316d08c"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68161.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68161.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}