CVE Catalog

CVE-2025-71292

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.32%

25th percentile - higher than 25% of all known CVEs

Summary

In the Linux kernel, the JFS filesystem has an nlink overflow during rename. When a directory's nlink is at maximum (-1), renaming a subdirectory causes a wrap to 0 and triggers a warning.

Risk Assessment

May lead to incorrect filesystem state and kernel warnings, potentially destabilizing the system.

Recommendation

Apply the Linux kernel patch that prevents nlink overflow in JFS during rename.

Other vulnerabilities in Linux kernel

See all
Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: jfs: nlink overflow in jfs_rename If nlink is maximal for a directory (-1) and inside that directory you perform a rename for some child directory (not moving from the parent), then the nlink of the first directory is first incremented and later decremented. Normally this is fine, but when nlink = -1 this causes a wrap around to 0, and then drop_nlink issues a warning. After applying the patch syzbot no longer issues any warnings. I also ran some basic fs tests to look for any regressions.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS