Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.10, < 6.11.11 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/21d1b618b6b9da46c5116c640ac4b1cc8d40d63aPatch
- https://git.kernel.org/stable/c/45a8f8232a495221ed058191629f5c628f21601aPatch
- https://git.kernel.org/stable/c/83af1cfa10d9aafdabd06b3655e07727f373b434Patch
- https://project-zero.issues.chromium.org/issues/379667898Patch
FAQ
What is CVE-2024-53143?
CVE-2024-53143 is a vulnerability with a CVSS score of 7.8 (HIGH). 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(). H...
How severe is CVE-2024-53143?
CVE-2024-53143 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-53143?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.