Description

In the Linux kernel, the following vulnerability has been resolved:

ext4: do not create EA inode under buffer lock

ext4_xattr_set_entry() creates new EA inodes while holding buffer lock
on the external xattr block. This is problematic as it nests all the
allocation locking (which acquires locks on other buffers) under the
buffer lock. This can even deadlock when the filesystem is corrupted and
e.g. quota file is setup to contain xattr block as data block. Move the
allocation of EA inode out of ext4_xattr_set_entry() into the callers.

Classification

CVE ID: CVE-2024-40972

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.08% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/0752e7fb549d90c33b4d4186f11cfd25a556d1dd
https://git.kernel.org/stable/c/737fb7853acd5bc8984f6f42e4bfba3334be8ae1
https://git.kernel.org/stable/c/111103907234bffd0a34fba070ad9367de058752
https://git.kernel.org/stable/c/0a46ef234756dca04623b7591e8ebb3440622f0b

Timeline