CVE-2026-72242
selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()
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.
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel.
- Refactor logic to use struct sock* directly.
- Avoid touching sk->sk_socket.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72242.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72242 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72242
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72242 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72242 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': 'cc8bd47b35eca82393cbad08b1cc86f02e034439', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': 'd61a80b17254be7230bc5544f8e62ddf21ab38e2', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '56acfeb10019e200ab6787d01f8d7cbe0f01526f', 'versionType': 'git'}], 'programFiles': ['security/selinux/hooks.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['security/selinux/hooks.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': 'cc8bd47b35eca82393cbad08b1cc86f02e034439', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': 'd61a80b17254be7230bc5544f8e62ddf21ab38e2', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '56acfeb10019e200ab6787d01f8d7cbe0f01526f', 'versionType': 'git'}], 'programFiles': ['security/selinux/hooks.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['security/selinux/hooks.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': 'cc8bd47b35eca82393cbad08b1cc86f02e034439', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': 'd61a80b17254be7230bc5544f8e62ddf21ab38e2', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb', 'versionType': 'git'}, {'status': 'affected', 'version': 'd452930fd3b9031e59abfeddb2fa383f1403d61a', 'lessThan': '56acfeb10019e200ab6787d01f8d7cbe0f01526f', 'versionType': 'git'}], 'programFiles': ['security/selinux/hooks.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['security/selinux/hooks.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb Added Reference https://git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f Added Reference https://git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4 Added Reference https://git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439 Added Reference https://git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2