Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < 2fcaf133a8fd88b69f32ebaecad93fd302da828f; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < a4bc2fb8536488b37680c0b66c59434a4b7f8c2f; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < cc8bd47b35eca82393cbad08b1cc86f02e034439; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < d61a80b17254be7230bc5544f8e62ddf21ab38e2; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb; >= d452930fd3b9031e59abfeddb2fa383f1403d61a, < 56acfeb10019e200ab6787d01f8d7cbe0f01526f |
| Linux | Linux | 4.17 |
References
- https://git.kernel.org/stable/c/2fcaf133a8fd88b69f32ebaecad93fd302da828f
- https://git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb
- https://git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f
- https://git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4
- https://git.kernel.org/stable/c/a4bc2fb8536488b37680c0b66c59434a4b7f8c2f
- https://git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439
- https://git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2
- https://git.kernel.org/stable/c/e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55
Timeline
- Published
- Aug 15, 2026
- Last modified
- Oct 16, 2026
- NVD status
- Received