CVE-2024-57943

exfat: fix the new buffer was not zeroed before writing

State: Published
Severity: 7.8 High
Published: Jan 21, 2025
Updated: May 11, 2026
Reserved: Jan 19, 2025

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().

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-824 Access of Uninitialized Pointer

Affected Products

Product	Versions
LinuxLinux	6630ea49103c3d45461e29b0f6eb0ce750aeb8f5 to before 942c6f91ab8d82a41650e717940b4e577173762fAffected 6630ea49103c3d45461e29b0f6eb0ce750aeb8f5 to before 98e2fb26d1a9eafe79f46d15d54e68e014d81d8cAffected
LinuxLinux	6.12Affected before 6.12Not affected 6.12.10 through 6.12.*Not affected 6.13 and laterNot affected

References

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