CyberRota Analysis
AI-GeneratedA use-after-free vulnerability in the Linux kernel's virtiofs implementation can lead to system crashes when the superblock is prematurely destroyed during the unmounting of submounts. This flaw primarily affects systems utilizing virtiofs for file sharing in virtualized environments, making it critical for organizations running Linux-based virtual machines to prioritize patching to mitigate potential disruptions.
Original NVD 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.
Related CVEs
Other vulnerabilities affecting the same vendor(s)