CVE-2025-71292 - jfs: nlink overflow in jfs_rename

CVE-2025-71292 - jfs: nlink overflow in jfs_rename

https://cvefeed.io/rssfeed/latest.atom / Wed, 05/06/2026 - 14:22
CVE ID :CVE-2025-71292
Published : May 6, 2026, 11:32 a.m. | 44 minutes ago
Description :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.
Severity: 0.0 | NA
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