CVE-2026-72242selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() selinux_sctp_bind_connect() dereferences sk->sk_socket to pass a struct socket * to selinux_socket_bind() and selinux_socket_connect_helper(). However, when the hook is invoked from the ASCONF softirq path (sctp_process_asconf), there is no file reference guaranteeing that sk->sk_socket is non-NULL. The setsockopt callers (bindx, connectx, set_primary, sendmsg connect) hold a file reference and are not affected. Both selinux_socket_bind() and selinux_socket_connect_helper() immediately resolve sock->sk, never using the struct socket * for anything else. Refactor the inner logic into helpers that take a struct sock * directly so that selinux_sctp_bind_connect() never needs to touch sk->sk_socket at all.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d452930fd3b9031e59abfeddb2fa383f1403d61a before e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55; from d452930fd3b9031e59abfeddb2fa383f1403d61a before 2fcaf133a8fd88b69f32ebaecad93fd302da828f; from d452930fd3b9031e59abfeddb2fa383f1403d61a before a4bc2fb8536488b37680c0b66c59434a4b7f8c2f; from d452930fd3b9031e59abfeddb2fa383f1403d61a before 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4; from d452930fd3b9031e59abfeddb2fa383f1403d61a before cc8bd47b35eca82393cbad08b1cc86f02e034439; from d452930fd3b9031e59abfeddb2fa383f1403d61a before d61a80b17254be7230bc5544f8e62ddf21ab38e2; from d452930fd3b9031e59abfeddb2fa383f1403d61a before 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb; from d452930fd3b9031e59abfeddb2fa383f1403d61a before 56acfeb10019e200ab6787d01f8d7cbe0f01526f | CNA record |
References
- https://git.kernel.org/stable/c/e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55
- https://git.kernel.org/stable/c/2fcaf133a8fd88b69f32ebaecad93fd302da828f
- https://git.kernel.org/stable/c/a4bc2fb8536488b37680c0b66c59434a4b7f8c2f
- https://git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4
- https://git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439
- https://git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2
- https://git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb
- https://git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.