CVE-2026-53381 | BDVDB-2026-349463 Detail
LinuxLinux
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.
Weaknesses#
- CWE-416 Use After Free
References#
- https://git.kernel.org/stable/c/607a1d4c42f649e6197567c0448fd9ebb316cd42
- https://git.kernel.org/stable/c/1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e
- https://git.kernel.org/stable/c/0b809199ff87c44487e516a725dd4be2185712ce
- https://git.kernel.org/stable/c/2181a09ba980f142650fb053666350ead4471cfe
- https://git.kernel.org/stable/c/97c4691653d145dcc699eca5d3aba3219a520f1f
- https://git.kernel.org/stable/c/2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9
- https://git.kernel.org/stable/c/39a2b95e008665c14f84e50ed411d898df7cd11b
- https://git.kernel.org/stable/c/e09412a714bcd49375198427bb4aa005037a9d6f
- https://git.kernel.org/stable/c/06b41351779e9289e8785694ade9042ae85e41ea
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.