CVE-2026-72242

selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()

State: Published
Severity: 7.5 High
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d452930fd3b9031e59abfeddb2fa383f1403d61a to before e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55Affected d452930fd3b9031e59abfeddb2fa383f1403d61a to before 2fcaf133a8fd88b69f32ebaecad93fd302da828fAffected d452930fd3b9031e59abfeddb2fa383f1403d61a to before a4bc2fb8536488b37680c0b66c59434a4b7f8c2fAffected d452930fd3b9031e59abfeddb2fa383f1403d61a to before 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4Affected d452930fd3b9031e59abfeddb2fa383f1403d61a to before cc8bd47b35eca82393cbad08b1cc86f02e034439Affected d452930fd3b9031e59abfeddb2fa383f1403d61a to before d61a80b17254be7230bc5544f8e62ddf21ab38e2Affected d452930fd3b9031e59abfeddb2fa383f1403d61a to before 37d642b37ccdc31e1947c2ebc8dc38f03d4a0cebAffected d452930fd3b9031e59abfeddb2fa383f1403d61a to before 56acfeb10019e200ab6787d01f8d7cbe0f01526fAffected
LinuxLinux	4.17Affected before 4.17Not affected 5.10.266 through 5.10.Not affected 5.15.217 through 5.15.Not affected 6.1.184 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

d452930fd3b9031e59abfeddb2fa383f1403d61a to before e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55Affected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before 2fcaf133a8fd88b69f32ebaecad93fd302da828fAffected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before a4bc2fb8536488b37680c0b66c59434a4b7f8c2fAffected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4Affected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before cc8bd47b35eca82393cbad08b1cc86f02e034439Affected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before d61a80b17254be7230bc5544f8e62ddf21ab38e2Affected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before 37d642b37ccdc31e1947c2ebc8dc38f03d4a0cebAffected
d452930fd3b9031e59abfeddb2fa383f1403d61a to before 56acfeb10019e200ab6787d01f8d7cbe0f01526fAffected

LinuxLinux

4.17Affected
before 4.17Not affected
5.10.266 through 5.10.*Not affected
5.15.217 through 5.15.*Not affected
6.1.184 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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