af_unix: Reject SIOCATMARK on non-stream sockets

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-52928
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 08:16:22 UTC
Updated2026-07-08 15:28:47 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.001140000 probability, percentile 0.017500000 (date 2026-07-09)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 ec123873fdc83e7244c8ed6d17b8f8ea6c416a67 git Not specified
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 f085971de6d6b8ef946a5e0bcd73ff24509a0f85 git Not specified
CNA Linux Linux affected 314001f0bf927015e459c9d387d62a231fe93af3 b741c9c6ef59f17c1f104ddf1217ef77f79ed29b git Not specified
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 5.15.211 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.177 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.144 6.6.* 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/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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