CVE-2026-90318

Description

In the Linux kernel, the following vulnerability has been resolved: fat: release buffer head after rebuilding parent fat_scan_logstart() leaves the matching directory entry's buffer head in sinfo.bh for the caller to release, just like fat_scan(). fat_rebuild_parent() uses the directory entry to rebuild the parent inode for the nostale_ro NFS export path, but does not release sinfo.bh after a successful scan. Release it once fat_build_inode() has consumed the directory entry data.

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EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393 https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755 https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1 https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8 https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826 https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3

Frequently Asked Questions

What is CVE-2026-90318? +

In the Linux kernel, the following vulnerability has been resolved: fat: release buffer head after rebuilding parent fat_scan_logstart() leaves the matching directory entry's buffer head in sinfo.bh for the caller to release, just like fat_scan(). fat_rebuild_parent() uses the directory entry to rebuild the parent inode for the nostale_ro NFS export path, but does not release sinfo.bh after a successful scan. Release it once fat_build_inode() has consumed the directory entry data.

How do I check if I'm vulnerable to CVE-2026-90318? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.