CVE-2026-31673 (GCVE-0-2026-31673)

Vulnerability from cvelistv5 – Published: 2026-04-25 08:46 – Updated: 2026-08-05 12:24
VLAI
Title
af_unix: read UNIX_DIAG_VFS data under unix_state_lock
Summary
In the Linux kernel, the following vulnerability has been resolved: af_unix: read UNIX_DIAG_VFS data under unix_state_lock Exact UNIX diag lookups hold a reference to the socket, but not to u->path. Meanwhile, unix_release_sock() clears u->path under unix_state_lock() and drops the path reference after unlocking. Read the inode and device numbers for UNIX_DIAG_VFS while holding unix_state_lock(), then emit the netlink attribute after dropping the lock. This keeps the VFS data stable while the reply is being built.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < e7339db13b9ddb63417b12da55fd6191e59f7442 (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < 4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7 (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < c3ec44ab4526bbc4b6c9fc845af86488244f4c9b (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < b9232421a77a649c9376c99fdfc8cb7f79cad34c (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < 0c739f3785f84af695952c2bac8be2f45082c9b8 (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < 900a4e0910e98b8caef117d5df00471fa438dcf9 (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < bdf206e740bf2919d818f132c8c9cc7ed91d11c0 (git)
Affected: 5f7b0569460b7d8d01ca776430a00505a68b7584 , < 39897df386376912d561d4946499379effa1e7ef (git)
Create a notification for this product.
Linux Linux Affected: 3.3
Unaffected: 0 , < 3.3 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-02T17:15:04+00:00",
      "cve": "CVE-2026-31673",
      "id": "CVE-2026-31673",
      "initial_release_date": "2026-04-25T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: af_unix: read UNIX_DIAG_VFS data under unix_state_lock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31673.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





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.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.