CVE-2024-35948: bcachefs: Check for journal entries overruning end of sb clean section

Severity: high (CVSS 7.8 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: 2024-05-20 · updated 2026-08-04
Weakness: CWE-400

Description

In the Linux kernel, the following vulnerability has been resolved: bcachefs: Check for journal entries overruning end of sb clean section Fix a missing bounds check in superblock validation. Note that we don't yet have repair code for this case - repair code for individual items is generally low priority, since the whole superblock is checksummed, validated prior to write, and we have backups.

Affected products

Linux kernel: from 6.7 before 6.9; 6.9-rc1, 6.9-rc2, 6.9-rc3, 6.9-rc4, 6.9-rc5 — fixed in 6.9

How to fix

Upgrade to a fixed version: Linux kernel 6.9. Check the vendor advisory for mitigations.

References

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