CVE-2026-43118

A flaw was found in the Linux kernel's Btrfs filesystem. When a file is truncated to zero size and then a hardlink is created, a power failure followed by log replay can cause the file to incorrectly retain its original size instead of being zero. This data integrity issue may lead to unexpected file content after system recovery.

Red Hat acknowledges the upstream Linux kernel correction for «btrfs» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.

To mitigate this issue, prevent the btrfs module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.