CVE-2026-52928
af_unix: Reject SIOCATMARK on non-stream sockets
CVSS Score
0.0
EPSS Score
0.2%
EPSS Percentile
5th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 24, 2026 |
| Last Updated | Jul 4, 2026 |
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Affected Versions
Linux / Linux
314001f0bf927015e459c9d387d62a231fe93af3 < ec123873fdc83e7244c8ed6d17b8f8ea6c416a67 314001f0bf927015e459c9d387d62a231fe93af3 < f085971de6d6b8ef946a5e0bcd73ff24509a0f85 314001f0bf927015e459c9d387d62a231fe93af3 < b741c9c6ef59f17c1f104ddf1217ef77f79ed29b 314001f0bf927015e459c9d387d62a231fe93af3 < 645b1ed3259af38b7814242a420bc2081bdd1eb6 314001f0bf927015e459c9d387d62a231fe93af3 < c34c41446acf6c0d13b5b06c809be11e0f7f2729 314001f0bf927015e459c9d387d62a231fe93af3 < 3147ddf5a41c20c45c2eb69e00b62f10f822056a 314001f0bf927015e459c9d387d62a231fe93af3 < d119775f2bad827edc28071c061fdd4a91f889a5
Linux / Linux
5.15
References
git.kernel.org: https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67 git.kernel.org: https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85 git.kernel.org: https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b git.kernel.org: https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6 git.kernel.org: https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729 git.kernel.org: https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a git.kernel.org: https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5