What’s Vulnerable › Vulnerabilities

CVE-2025-21830: landlock: Handle weird files

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-06 · updated 2026-10-15

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.

Affected products

• Linux kernel: from 5.13 before 5.15.179; from 5.16 before 6.1.129; from 6.2 before 6.6.76; from 6.7 before 6.12.13; from 6.13 before 6.13.2 — fixed in 5.15.179, 6.1.129, 6.12.13, 6.13.2, 6.6.76

How to fix

Upgrade to a fixed version: Linux kernel 5.15.179, 6.1.129, 6.12.13, 6.13.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0fde195a373ab1267e60baa9e1a703a97e7464cd
• https://git.kernel.org/stable/c/2569e65d2eb6ac1afe6cb6dfae476afee8b6771a
• https://git.kernel.org/stable/c/39bb3d56f1c351e76bb18895d0e73796e653d5c1
• https://git.kernel.org/stable/c/49440290a0935f428a1e43a5ac8dc275a647ff80
• https://git.kernel.org/stable/c/7d6121228959ddf44a4b9b6a177384ac7854e2f9
• https://git.kernel.org/stable/c/a1fccf6b72b56343dd4f2d96b008147f9951eebd
• https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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