Description

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

exfat: fix the new buffer was not zeroed before writing

Before writing, if a buffer_head marked as new, its data must
be zeroed, otherwise uninitialized data in the page cache will
be written.

So this commit uses folio_zero_new_buffers() to zero the new
buffers before ->write_end().

Classification

CVE ID: CVE-2024-57943

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.7% (scored less or equal to compared to others)

EPSS Date: 2025-02-19 (when was this score calculated)

References

https://git.kernel.org/stable/c/942c6f91ab8d82a41650e717940b4e577173762f
https://git.kernel.org/stable/c/98e2fb26d1a9eafe79f46d15d54e68e014d81d8c

Timeline