{"id":"CVE-2026-68162","summary":"sctp: avoid auth_enable sysctl UAF during netns teardown","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: avoid auth_enable sysctl UAF during netns teardown\n\nproc_sctp_do_auth() updates the SCTP control socket after changing\nnet.sctp.auth_enable. The handler gets the per-net SCTP state from\nctl-\u003edata, so an already opened sysctl file can still target a network\nnamespace while that namespace is being torn down.\n\nSCTP previously registered its per-net sysctls from sctp_defaults_init(),\nwhile the control socket is created later from sctp_ctrlsock_init(). This\nexposed a window during initialization where auth_enable was writable\nbefore net-\u003esctp.ctl_sock existed, and a teardown window where auth_enable\nstayed writable after inet_ctl_sock_destroy() had released the control\nsocket.\n\nMove the per-net SCTP sysctl registration into sctp_ctrlsock_init() after\nsctp_ctl_sock_init() succeeds, and unregister the sysctl table before\ndestroying the control socket in sctp_ctrlsock_exit(). If sysctl\nregistration fails after the control socket was created, destroy the\ncontrol socket in the same init path.\n\nMake sctp_sysctl_net_unregister() tolerate a missing header and clear the\nsaved pointer so init-error and exit paths can safely share the unregister\nhelper.","modified":"2026-09-18T10:11:41.070175900Z","published":"2026-08-10T11:59:29.099Z","related":["SUSE-SU-2026:23477-1","SUSE-SU-2026:23481-1","SUSE-SU-2026:23528-1","SUSE-SU-2026:23529-1","SUSE-SU-2026:4120-1","SUSE-SU-2026:4254-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68162.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/158f3cc332dc53f43ec20060233d7c3cecd6d912"},{"type":"WEB","url":"https://git.kernel.org/stable/c/19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/626bda8cfe43dff19a9833ff6ba055a817b5455c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/66700c0719675e0e118ae83b2d7168dacd69dd3d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a50e73488e0bbdd262b3be3c9a1d8dd078382381"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be6aae9d1b91c603adb35872d37d40e83daf8758"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ceb7190b5c873d4a1267a1600c5aa52c600e929f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f8d5e7846025f4ab15a461235f8ebae9094a361a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd66854a22661929245f3d2b244c432bc8b1a150"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68162.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68162"},{"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":"10c869a52f266e40f548cc3c565d14930a5edafc"},{"fixed":"19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dc583e7e5f8515ca489c0df28e4362a70eade382"},{"fixed":"ceb7190b5c873d4a1267a1600c5aa52c600e929f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bd2a2939423566c654545fa3e96a656662a0af9e"},{"fixed":"fd66854a22661929245f3d2b244c432bc8b1a150"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1b67030d39f2b00f94ac1f0af11ba6657589e4d3"},{"fixed":"158f3cc332dc53f43ec20060233d7c3cecd6d912"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6"},{"fixed":"66700c0719675e0e118ae83b2d7168dacd69dd3d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c184bc621e3cef03ac9ba81a50dda2dae6a21d36"},{"fixed":"626bda8cfe43dff19a9833ff6ba055a817b5455c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"15649fd5415eda664ef35780c2013adeb5d9c695"},{"fixed":"be6aae9d1b91c603adb35872d37d40e83daf8758"},{"fixed":"a50e73488e0bbdd262b3be3c9a1d8dd078382381"},{"fixed":"f8d5e7846025f4ab15a461235f8ebae9094a361a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.290"},{"fixed":"5.4.292"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.234"},{"fixed":"5.10.266"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.177"},{"fixed":"5.15.217"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.125"},{"fixed":"6.1.184"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.72"},{"fixed":"6.6.151"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.10"},{"fixed":"6.12.101"}]}],"versions":["v5.4.291","v5.4.290","v5.10.265","v5.10.264","v5.10.263","v5.10.262","v5.10.261","v5.10.260","v5.10.259","v5.10.258","v5.10.257","v5.10.256","v5.10.255","v5.10.254","v5.10.253","v5.10.252","v5.10.251","v5.10.250","v5.10.249","v5.10.248","v5.10.247","v5.10.246","v5.10.245","v5.10.244","v5.10.243","v5.10.242","v5.10.241","v5.10.240","v5.10.239","v5.10.238","v5.10.237","v5.10.236","v5.10.235","v5.10.234","v5.15.216","v5.15.215","v5.15.214","v5.15.213","v5.15.212","v5.15.211","v5.15.210","v5.15.209","v5.15.208","v5.15.207","v5.15.206","v5.15.205","v5.15.204","v5.15.203","v5.15.202","v5.15.201","v5.15.200","v5.15.199","v5.15.198","v5.15.197","v5.15.196","v5.15.195","v5.15.194","v5.15.193","v5.15.192","v5.15.191","v5.15.190","v5.15.189","v5.15.188","v5.15.187","v5.15.186","v5.15.185","v5.15.184","v5.15.183","v5.15.182","v5.15.181","v5.15.180","v5.15.179","v5.15.178","v5.15.177","v6.1.183","v6.1.182","v6.1.181","v6.1.180","v6.1.179"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