CVE-2024-43828

In the Linux kernel, the following vulnerability has been resolved: ext4: fix infinite loop when replaying fast_commit When doing fast_commit replay an infinite loop may occur due to an uninitialized extent_status struct. ext4_ext_determine_insert_hole() does not detect the replay and calls ext4_es_find_extent_range(), which will return immediately without initializing the 'es' variable. Because 'es' contains garbage, an integer overflow may happen causing an infinite loop in this function, easily reproducible using fstest generic/039. This commit fixes this issue by unconditionally initializing the structure in function ext4_es_find_extent_range(). Thanks to Zhang Yi, for figuring out the real problem!

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-25)

CWE

CWE-835

Published

2024-08-17

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/0619f7750f2b178a1309808832ab20d85e0ad121
• https://git.kernel.org/stable/c/181e63cd595c688194e07332f9944b3a63193de2
• https://git.kernel.org/stable/c/5ed0496e383cb6de120e56991385dce70bbb87c1
• https://git.kernel.org/stable/c/81f819c537d29932e4b9267f02411cbc8b355178
• https://git.kernel.org/stable/c/907c3fe532253a6ef4eb9c4d67efb71fab58c706

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