af_unix: Reject SIOCATMARK on non-stream sockets

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Summary

CVECVE-2026-52928
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 08:16:22 UTC
Updated2026-06-24 08:16:22 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: af_unix: Reject SIOCATMARK on non-stream sockets SIOCATMARK reports whether the receive queue is at the urgent mark for MSG_OOB. In AF_UNIX, MSG_OOB is supported only for SOCK_STREAM sockets. SOCK_DGRAM and SOCK_SEQPACKET reject MSG_OOB in sendmsg() and recvmsg(), so they should not support SIOCATMARK either. Return -EOPNOTSUPP for non-stream sockets before checking the receive queue.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 645b1ed3259af38b7814242a420bc2081bdd1eb6 git Not specified
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 c34c41446acf6c0d13b5b06c809be11e0f7f2729 git Not specified
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 3147ddf5a41c20c45c2eb69e00b62f10f822056a git Not specified
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 d119775f2bad827edc28071c061fdd4a91f889a5 git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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