What’s Vulnerable › Vulnerabilities

CVE-2025-38663: nilfs2: reject invalid file types when reading inodes

• 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: 2025-08-22 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: reject invalid file types when reading inodes To prevent inodes with invalid file types from tripping through the vfs and causing malfunctions or assertion failures, add a missing sanity check when reading an inode from a block device. If the file type is not valid, treat it as a filesystem error.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 2.6.30 before 5.4.297; from 5.5 before 5.10.241; from 5.11 before 5.15.190; from 5.16 before 6.1.148; from 6.2 before 6.6.101; from 6.7 before 6.12.41 — fixed in 5.10.241, 5.15.190, 5.4.297, 6.1.148, 6.12.41, 6.15.9

How to fix

Upgrade to a fixed version: Linux kernel 5.10.241, 5.15.190, 5.4.297, 6.1.148. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1a5c204e175a78556b8ef1f7683249fa5197295a
• https://git.kernel.org/stable/c/2cf0c4130bf340be3935d097a3dcbfefdcf65815
• https://git.kernel.org/stable/c/42cd46b3a8b1497b9258dc7ac445dbd6beb73e2f
• https://git.kernel.org/stable/c/4aead50caf67e01020c8be1945c3201e8a972a27
• https://git.kernel.org/stable/c/79663a15a1c70ca84f86f2dbba07b423fe7d5d4f
• https://git.kernel.org/stable/c/98872a934ea6a95985fb6a3655a78a5f0c114e82
• https://git.kernel.org/stable/c/bf585ee198bba4ff25b0d80a0891df4656cb0d08
• https://git.kernel.org/stable/c/dd298c0b889acd3ecaf48b6e840c9ab91882e342
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

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