CVE-2026-43299
kernel: btrfs: do not ASSERT() when the fs flips RO inside btrfs_repair_io_failure()
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 8, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's btrfs filesystem. When the filesystem encounters an out-of-space (ENOSPC) error and transitions to a read-only state, a pending read repair operation can trigger an assertion failure within the btrfs_repair_io_failure() function. This issue can lead to a kernel crash, resulting in a denial of service for the affected system.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition