Vulnerabilities
Vulnerable Software

Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 5.6%
CVSS Severity
CVSS v3 Score 5.5
Products affected by CVE-2026-52928


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