CVE-2026-68422

A flaw was found in the btrfs filesystem component of the Linux kernel. An unexpected relocation root in the merge_reloc_roots() function can lead to a resource leak. This occurs because a reference to the root is not properly released, potentially causing system instability or a denial of service due to resource exhaustion.

This issue affects systems using the Btrfs file system during balance/relocation operations. If merge_reloc_roots() encounters an unexpected relocation root, it exits without releasing a reference on the root structure, leaking memory. Over time this can contribute to resource exhaustion on affected workloads.

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.