{"id":"CVE-2026-68162","revision":null,"records":[{"revision":"1fd7582498044feea7e061f9a0996039","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68162","aliases":[],"title":"sctp: avoid auth_enable sysctl UAF during netns teardown","description":"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->data, 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->sctp.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.","state":0,"publishedAt":"2026-08-10T11:59:29.099+00:00","modifiedAt":"2026-10-19T20:58:55.689+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 \"net/sctp/sysctl.c\"\n ],\n \"versions\": [\n {\n \"version\": \"10c869a52f266e40f548cc3c565d14930a5edafc\",\n \"lessThan\": \"19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"dc583e7e5f8515ca489c0df28e4362a70eade382\",\n \"lessThan\": \"ceb7190b5c873d4a1267a1600c5aa52c600e929f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"bd2a2939423566c654545fa3e96a656662a0af9e\",\n \"lessThan\": \"fd66854a22661929245f3d2b244c432bc8b1a150\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b67030d39f2b00f94ac1f0af11ba6657589e4d3\",\n \"lessThan\": \"158f3cc332dc53f43ec20060233d7c3cecd6d912\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6\",\n \"lessThan\": \"66700c0719675e0e118ae83b2d7168dacd69dd3d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c184bc621e3cef03ac9ba81a50dda2dae6a21d36\",\n \"lessThan\": \"626bda8cfe43dff19a9833ff6ba055a817b5455c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15649fd5415eda664ef35780c2013adeb5d9c695\",\n \"lessThan\": \"be6aae9d1b91c603adb35872d37d40e83daf8758\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15649fd5415eda664ef35780c2013adeb5d9c695\",\n \"lessThan\": \"a50e73488e0bbdd262b3be3c9a1d8dd078382381\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15649fd5415eda664ef35780c2013adeb5d9c695\",\n \"lessThan\": \"f8d5e7846025f4ab15a461235f8ebae9094a361a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.4.290\",\n \"lessThan\": \"5.4.292\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.234\",\n \"lessThan\": \"5.10.266\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.177\",\n \"lessThan\": \"5.15.217\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.125\",\n \"lessThan\": \"6.1.184\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.72\",\n \"lessThan\": \"6.6.151\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.10\",\n \"lessThan\": \"6.12.101\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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 \"net/sctp/sysctl.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.13\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.13\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.292\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.266\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.217\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.184\",\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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4","https://git.kernel.org/stable/c/ceb7190b5c873d4a1267a1600c5aa52c600e929f","https://git.kernel.org/stable/c/fd66854a22661929245f3d2b244c432bc8b1a150","https://git.kernel.org/stable/c/158f3cc332dc53f43ec20060233d7c3cecd6d912","https://git.kernel.org/stable/c/66700c0719675e0e118ae83b2d7168dacd69dd3d","https://git.kernel.org/stable/c/626bda8cfe43dff19a9833ff6ba055a817b5455c","https://git.kernel.org/stable/c/be6aae9d1b91c603adb35872d37d40e83daf8758","https://git.kernel.org/stable/c/a50e73488e0bbdd262b3be3c9a1d8dd078382381","https://git.kernel.org/stable/c/f8d5e7846025f4ab15a461235f8ebae9094a361a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68162","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68162","identifiers":["CVE-2026-68162"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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