CVE-2026-52928 (GCVE-0-2026-52928)

Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-06-24 07:14
VLAI
Title
af_unix: Reject SIOCATMARK on non-stream sockets
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 314001f0bf927015e459c9d387d62a231fe93af3 , < 645b1ed3259af38b7814242a420bc2081bdd1eb6 (git)
Affected: 314001f0bf927015e459c9d387d62a231fe93af3 , < c34c41446acf6c0d13b5b06c809be11e0f7f2729 (git)
Affected: 314001f0bf927015e459c9d387d62a231fe93af3 , < 3147ddf5a41c20c45c2eb69e00b62f10f822056a (git)
Affected: 314001f0bf927015e459c9d387d62a231fe93af3 , < d119775f2bad827edc28071c061fdd4a91f889a5 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "net/unix/af_unix.c"
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              "operator": "OR"
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      ],
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Reject SIOCATMARK on non-stream sockets\n\nSIOCATMARK reports whether the receive queue is at the urgent mark for\nMSG_OOB.\n\nIn AF_UNIX, MSG_OOB is supported only for SOCK_STREAM sockets.\nSOCK_DGRAM and SOCK_SEQPACKET reject MSG_OOB in sendmsg() and recvmsg(),\nso they should not support SIOCATMARK either.\n\nReturn -EOPNOTSUPP for non-stream sockets before checking the receive\nqueue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T07:14:21.367Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6"
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      "title": "af_unix: Reject SIOCATMARK on non-stream sockets",
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    "datePublished": "2026-06-24T07:14:21.367Z",
    "dateReserved": "2026-06-09T07:44:35.368Z",
    "dateUpdated": "2026-06-24T07:14:21.367Z",
    "state": "PUBLISHED"
  },
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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