PT-2026-20426 · Btrfs+4 · Btrfs+4
Published
2026-01-01
·
Updated
2026-05-22
·
CVE-2026-23214
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.19.0-rc5-00002-gb71e635feefc
Description
The Btrfs file system in the Linux kernel allows new transactions even when the file system is read-only. This behavior can lead to warnings and potential issues during unmount when the file system is heavily corrupted and mounted with rescue options, as it can trigger new transactions during inode eviction. The issue arises because Btrfs permits transactions for log replay even on read-only mounts, similar to ext4 and XFS. However, when rescue mount options are used, the file system is fully read-only and cannot be remounted read-write, so new transactions should be rejected.
Recommendations
Update the Linux kernel to version 6.19.0-rc5-00002-gb71e635feefc or a later version to address this issue.
Exploit
Fix
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Related Identifiers
Affected Products
Btrfs
Linux Kernel
Ubuntu
Xfs
Ext4