{"id":"CVE-2026-72242","summary":"selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: avoid sk_socket dereference in selinux_sctp_bind_connect()\n\nselinux_sctp_bind_connect() dereferences sk-\u003esk_socket to pass a\nstruct socket * to selinux_socket_bind() and\nselinux_socket_connect_helper().  However, when the hook is invoked\nfrom the ASCONF softirq path (sctp_process_asconf), there is no file\nreference guaranteeing that sk-\u003esk_socket is non-NULL.  The setsockopt\ncallers (bindx, connectx, set_primary, sendmsg connect) hold a file\nreference and are not affected.\n\nBoth selinux_socket_bind() and selinux_socket_connect_helper()\nimmediately resolve sock-\u003esk, never using the struct socket * for\nanything else.  Refactor the inner logic into helpers that take a\nstruct sock * directly so that selinux_sctp_bind_connect() never needs\nto touch sk-\u003esk_socket at all.","modified":"2026-08-18T03:56:39.350042493Z","published":"2026-08-15T05:54:30.378Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72242.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72242.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72242"},{"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":"d452930fd3b9031e59abfeddb2fa383f1403d61a"},{"fixed":"5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4"},{"fixed":"cc8bd47b35eca82393cbad08b1cc86f02e034439"},{"fixed":"d61a80b17254be7230bc5544f8e62ddf21ab38e2"},{"fixed":"37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb"},{"fixed":"56acfeb10019e200ab6787d01f8d7cbe0f01526f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72242.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.17.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72242.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:N/I:N/A:H"}]}