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Back to active CVEs
High · CVSS 7.3CVE-2025-21830

landlock: Handle weird filesCVE-2025-21830

Answer in brief

CVE-2025-21830 records a High severity (CVSS 7.3) vulnerability in landlock: Handle weird files. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 6, 2025Updated Oct 15, 2026Source checked Nov 5, 2026First seen by HOL Aug 5, 2026Material review Oct 15, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
NVD-CWE-noinfo
Source
CVE List V5
Source checked
Nov 5, 2026
References
8 linked sources
Open source record

Key facts

Risk
High · CVSS 7.3
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=cb2c7d1a1776057c9a1f48ed1250d85e94d4850d <a1fccf6b72b56343dd4f2d96b008147f9951eebd || >=cb2c7d1a1776057c9a1f48ed1250d85e94d4850d <7d6121228959ddf44a4b9b6a177384ac7854e2f9 || >=cb2c7d1a1776057c9a1f48ed1250d85e94d4850d <39bb3d56f1c351e76bb18895d0e73796e653d5c1 || >=cb2c7d1a1776057c9a1f48ed1250d85e94d4850d <2569e65d2eb6ac1afe6cb6dfae476afee8b6771a || >=cb2c7d1a1776057c9a1f48ed1250d85e94d4850d <0fde195a373ab1267e60baa9e1a703a97e7464cd || >=cb2c7d1a1776057c9a1f48ed1250d85e94d4850d <49440290a0935f428a1e43a5ac8dc275a647ff80a1fccf6b72b56343dd4f2d96b008147f9951eebd, 7d6121228959ddf44a4b9b6a177384ac7854e2f9, 39bb3d56f1c351e76bb18895d0e73796e653d5c1, 2569e65d2eb6ac1afe6cb6dfae476afee8b6771a, 0fde195a373ab1267e60baa9e1a703a97e7464cd, 49440290a0935f428a1e43a5ac8dc275a647ff80
Linux/Linuxgeneric5.13Not reported
Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric>=0 <**

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem.
  2. 2Review the reported fix. Update Linux/Linux to a1fccf6b72b56343dd4f2d96b008147f9951eebd; Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to * if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Mar 6, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencecert-portal.siemens.com
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencelists.debian.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: landlock: Handle weird files A corrupted filesystem (e.g. bcachefs) might return weird files. Instead of throwing a warning and allowing access to such file, treat them as regular files.

Quoted source text, attributed separately from HOL analysis.