What’s Vulnerable › Vulnerabilities

CVE-2024-46752: btrfs: replace BUG_ON() with error handling at update_ref_for_cow()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-18 · updated 2026-06-17
• Weakness: CWE-404

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).

Affected products

• Linux kernel: before 5.15.167; from 5.16 before 6.1.110; from 6.2 before 6.6.51; from 6.7 before 6.10.10 — fixed in 5.15.167, 6.1.110, 6.10.10, 6.6.51

How to fix

Upgrade to a fixed version: Linux kernel 5.15.167, 6.1.110, 6.10.10, 6.6.51. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0fbac73a97286a7ec72229cb9b42d760a2c717ac
• https://git.kernel.org/stable/c/41a0f85e268d72fe04f731b8ceea4748c2d65491
• https://git.kernel.org/stable/c/b50857b96429a09fd3beed9f7f21b7bb7c433688
• https://git.kernel.org/stable/c/b56329a782314fde5b61058e2a25097af7ccb675
• https://git.kernel.org/stable/c/f895db00c65e5d77c437cce946da9ec29dcdf563
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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