CVE-2026-52928
kernel: af_unix: Reject SIOCATMARK on non-stream sockets
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 24, 2026
Updated · July 9, 2026
Description
A flaw was found in the Linux kernel's af_unix component. This vulnerability involves the incorrect handling of the SIOCATMARK operation when used with non-stream sockets, such as SOCK_DGRAM and SOCK_SEQPACKET. These socket types did not properly reject SIOCATMARK, an operation intended only for SOCK_STREAM sockets. This could lead to unexpected system behavior when an application attempts to perform this unsupported operation.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1287 · Improper Validation of Specified Type of Input