NetSight
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medium5.5

CVE-2026-52928

In the Linux kernel, the following vulnerability has been resolved: af_unix: Reject SIOCATMARK on non-stream sockets SIOCATMARK reports whether the receive que…

Impact

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

VendorProductAffected versions
LinuxLinux Kernel
from 5.15 before 5.15.211
from 5.16 before 6.1.177
from 6.2 before 6.6.144
from 6.7 before 6.12.88
from 6.13 before 6.18.30
from 6.19 before 7.0.7

References