CVE-2026-90318

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < 5e44b6944e11fd6647f028219ad0be4e85e9aceeaffected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < d2a86329152c69a6200c15b2bf618755f8563826affected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < 0f18d712ba9c980e05b7e33a27cde4fe3ed2d393affected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < e38587d98d1ceac608420052c0cdd901d25878f3affected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < c6a67aa438179cad40f8ae45469e304338d65c0aaffected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < 571ea4263d69df1b48578e4314a828ecd0604755affected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < 7565e44507634514e3e1899d3acad3de43f7a2c1affected
LinuxLinuxf1e6fb0ab451dae8523fbb8c119a653b2730e938 < 83e98dbf19ab64e8528e101e20f8d50e1aaa68a8affected
LinuxLinux3.10affected
LinuxLinux0 < 3.10unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References