CVE-2026-52928
af_unix: Reject SIOCATMARK on non-stream sockets
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.
INFO
Published Date :
June 24, 2026, 8:16 a.m.
Last Modified :
July 8, 2026, 3:28 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to the latest version.
- Apply the patch for AF_UNIX SIOCATMARK handling.
- Ensure non-stream sockets do not support SIOCATMARK.
Public PoC/Exploit Available at Github
CVE-2026-52928 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52928.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52928 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52928
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-52928 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52928 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.30 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.88 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.177 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.144 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.211 Added Reference Type kernel.org: https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 04, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b Added Reference https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67 Added Reference https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': '645b1ed3259af38b7814242a420bc2081bdd1eb6', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'c34c41446acf6c0d13b5b06c809be11e0f7f2729', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': '3147ddf5a41c20c45c2eb69e00b62f10f822056a', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'd119775f2bad827edc28071c061fdd4a91f889a5', 'versionType': 'git'}], 'programFiles': ['net/unix/af_unix.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.88', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.30', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.7', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/unix/af_unix.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'ec123873fdc83e7244c8ed6d17b8f8ea6c416a67', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'f085971de6d6b8ef946a5e0bcd73ff24509a0f85', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'b741c9c6ef59f17c1f104ddf1217ef77f79ed29b', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': '645b1ed3259af38b7814242a420bc2081bdd1eb6', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'c34c41446acf6c0d13b5b06c809be11e0f7f2729', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': '3147ddf5a41c20c45c2eb69e00b62f10f822056a', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'd119775f2bad827edc28071c061fdd4a91f889a5', 'versionType': 'git'}], 'programFiles': ['net/unix/af_unix.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.211', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.177', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.144', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.88', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.30', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.7', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/unix/af_unix.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': '645b1ed3259af38b7814242a420bc2081bdd1eb6', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'c34c41446acf6c0d13b5b06c809be11e0f7f2729', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': '3147ddf5a41c20c45c2eb69e00b62f10f822056a', 'versionType': 'git'}, {'status': 'affected', 'version': '314001f0bf927015e459c9d387d62a231fe93af3', 'lessThan': 'd119775f2bad827edc28071c061fdd4a91f889a5', 'versionType': 'git'}], 'programFiles': ['net/unix/af_unix.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.88', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.30', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.7', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/unix/af_unix.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a Added Reference https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6 Added Reference https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729 Added Reference https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5