CVE-2026-90318

fat: release buffer head after rebuilding parent

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 5e44b6944e11fd6647f028219ad0be4e85e9aceeAffected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before d2a86329152c69a6200c15b2bf618755f8563826Affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 0f18d712ba9c980e05b7e33a27cde4fe3ed2d393Affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before e38587d98d1ceac608420052c0cdd901d25878f3Affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before c6a67aa438179cad40f8ae45469e304338d65c0aAffected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 571ea4263d69df1b48578e4314a828ecd0604755Affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 7565e44507634514e3e1899d3acad3de43f7a2c1Affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 83e98dbf19ab64e8528e101e20f8d50e1aaa68a8Affected
LinuxLinux	3.10Affected before 3.10Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 5e44b6944e11fd6647f028219ad0be4e85e9aceeAffected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before d2a86329152c69a6200c15b2bf618755f8563826Affected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 0f18d712ba9c980e05b7e33a27cde4fe3ed2d393Affected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before e38587d98d1ceac608420052c0cdd901d25878f3Affected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before c6a67aa438179cad40f8ae45469e304338d65c0aAffected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 571ea4263d69df1b48578e4314a828ecd0604755Affected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 7565e44507634514e3e1899d3acad3de43f7a2c1Affected
f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 83e98dbf19ab64e8528e101e20f8d50e1aaa68a8Affected

LinuxLinux

3.10Affected
before 3.10Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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