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CVE-2026-53381

7.8 high SSVC exploitation: none Modified
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: virtiofs: fix UAF on submount umount iput() called from fuse_release_end() can Oops if the super block has already been destroyed. Normally this is prevented by waiting for num_waiting to go down to zero before commencing with super block shutdown. This only works, however, for the last submount instance, as the wait counter is per connection, not per superblock. Revert to using synchronous release requests for the auto_submounts case, which is virtiofs only at this time.

Fix

Patch, vendor advisory and mitigation references on NVD 9

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 2

  1. StatusAnalyzed → ModifiedNVD modified 2026-10-19 20:19
  2. First seenCVSS 7.8 · linuxNVD modified 2026-10-16 16:18

Affected (CPE criteria) 1

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

References 9