CVE-2024-53143

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/21d1b618b6b9da46c5116c640ac4b1cc8d40d63a	Patch
https://git.kernel.org/stable/c/45a8f8232a495221ed058191629f5c628f21601a	Patch
https://git.kernel.org/stable/c/83af1cfa10d9aafdabd06b3655e07727f373b434	Patch
https://project-zero.issues.chromium.org/issues/379667898	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-12-07 07:15

Updated : 2025-03-24 17:27

NVD link : CVE-2024-53143

Mitre link : CVE-2024-53143

CVE.ORG link : CVE-2024-53143

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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