{"id":"CVE-2026-72242","title":"selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()","summary":"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->sk_socket to pass a\nstruct socket * to selinux_socket_…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 2fcaf133a8fd88b69f32ebaecad93fd302da828f","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < a4bc2fb8536488b37680c0b66c59434a4b7f8c2f","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < cc8bd47b35eca82393cbad08b1cc86f02e034439","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < d61a80b17254be7230bc5544f8e62ddf21ab38e2","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb","Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 56acfeb10019e200ab6787d01f8d7cbe0f01526f","Linux 4.17"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T18:44:48.700097Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:45:04.443Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72242","references":[{"url":"https://git.kernel.org/stable/c/e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55"},{"url":"https://git.kernel.org/stable/c/2fcaf133a8fd88b69f32ebaecad93fd302da828f"},{"url":"https://git.kernel.org/stable/c/a4bc2fb8536488b37680c0b66c59434a4b7f8c2f"},{"url":"https://git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4"},{"url":"https://git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439"},{"url":"https://git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2"},{"url":"https://git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb"},{"url":"https://git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f"}],"tags":["cve.org"],"epss":0.00696,"epssPercentile":0.5205,"ingestedAt":"2026-10-16T19:46:24.418Z","slug":"CVE-2026-72242","body":"## Overview\n\nIn 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->sk_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->sk_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->sk, 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->sk_socket at all.\n\n## Affected\n\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 2fcaf133a8fd88b69f32ebaecad93fd302da828f`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < a4bc2fb8536488b37680c0b66c59434a4b7f8c2f`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < cc8bd47b35eca82393cbad08b1cc86f02e034439`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < d61a80b17254be7230bc5544f8e62ddf21ab38e2`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb`\n- `Linux >= d452930fd3b9031e59abfeddb2fa383f1403d61a < 56acfeb10019e200ab6787d01f8d7cbe0f01526f`\n- `Linux 4.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}