CVE-2024-53143 (GCVE-0-2024-53143)
Vulnerability from cvelistv5
Published
2024-12-07 06:40
Modified
2026-08-05 11:44
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fsnotify: Fix ordering of iput() and watched_objects decrement Ensure the superblock is kept alive until we're done with iput(). Holding a reference to an inode is not allowed unless we ensure the superblock stays alive, which fsnotify does by keeping the watched_objects count elevated, so iput() must happen before the watched_objects decrement. This can lead to a UAF of something like sb->s_fs_info in tmpfs, but the UAF is hard to hit because race orderings that oops are more likely, thanks to the CHECK_DATA_CORRUPTION() block in generic_shutdown_super(). Also, ensure that fsnotify_put_sb_watched_objects() doesn't call fsnotify_sb_watched_objects() on a superblock that may have already been freed, which would cause a UAF read of sb->s_fsnotify_info.
References
Impacted products
Vendor Product Version
Linux Linux Version: d2f277e26f521ccf6fb438463b41dba6123caabe
Version: d2f277e26f521ccf6fb438463b41dba6123caabe
Version: d2f277e26f521ccf6fb438463b41dba6123caabe
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