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.
Does this matter?
Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.11% probability · 2th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056aPatch
- https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6Patch
- https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29bPatch
- https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729Patch
- https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5Patch
- https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67Patch
- https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.