CVE-2026-52928

MediumCVSS 5.5/10Last modified Nov 6, 2026

Description

In 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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= 314001f0bf927015e459c9d387d62a231fe93af3, < ec123873fdc83e7244c8ed6d17b8f8ea6c416a67; >= 314001f0bf927015e459c9d387d62a231fe93af3, < f085971de6d6b8ef946a5e0bcd73ff24509a0f85; >= 314001f0bf927015e459c9d387d62a231fe93af3, < b741c9c6ef59f17c1f104ddf1217ef77f79ed29b; >= 314001f0bf927015e459c9d387d62a231fe93af3, < 645b1ed3259af38b7814242a420bc2081bdd1eb6; >= 314001f0bf927015e459c9d387d62a231fe93af3, < c34c41446acf6c0d13b5b06c809be11e0f7f2729; >= 314001f0bf927015e459c9d387d62a231fe93af3, < 3147ddf5a41c20c45c2eb69e00b62f10f822056a; >= 314001f0bf927015e459c9d387d62a231fe93af3, < d119775f2bad827edc28071c061fdd4a91f889a5
LinuxLinux5.15
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< *

References

Timeline

Published
Jun 24, 2026
Last modified
Nov 6, 2026
NVD status
Modified

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