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CVE-2026-52928 In the Linux kernel, the following vulnerability has been resolved: af_unix: Reject SIOCATMARK on non-stream sockets…

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.

Affected products and versions

Product Affected versions Fixed in
Linux 7.1 earliest → < 7.1 7.1
Linux 7.0 earliest → < 7.0.7 7.0.7
Linux 6.18 earliest → < 6.18.30 6.18.30
Linux 6.12 earliest → < 6.12.88 6.12.88
Linux 6.6 earliest → < 6.6.144 6.6.144
Linux 6.1 earliest → < 6.1.177 6.1.177
Linux 5.15 5.15.211
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions not published

References

Timeline

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