selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72242
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:51 UTC
Updated2026-08-17 06:18:25 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.005950000 probability, percentile 0.456210000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d452930fd3b9031e59abfeddb2fa383f1403d61a 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4 git Not specified
CNA Linux Linux affected d452930fd3b9031e59abfeddb2fa383f1403d61a cc8bd47b35eca82393cbad08b1cc86f02e034439 git Not specified
CNA Linux Linux affected d452930fd3b9031e59abfeddb2fa383f1403d61a d61a80b17254be7230bc5544f8e62ddf21ab38e2 git Not specified
CNA Linux Linux affected d452930fd3b9031e59abfeddb2fa383f1403d61a 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb git Not specified
CNA Linux Linux affected d452930fd3b9031e59abfeddb2fa383f1403d61a 56acfeb10019e200ab6787d01f8d7cbe0f01526f git Not specified
CNA Linux Linux affected 4.17 Not specified
CNA Linux Linux unaffected 4.17 semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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