The Linux kernel bug causes a failure in the Btrfs zoned finish routine. If call_zone_finish() fails, the active block group remains listed in zone_active_bgs, leaving a leaked reference and preventing waiting threads from being notified. Because the block group stays read‑only and its zone state is inconsistent, the allocation paths spin in btrfs_zoned_activate_one_bg, which can block further file‑system activity.

Linux kernel builds that include Btrfs with zoned support are affected. No specific kernel version is cited in the CNA data, so any kernel where Btrfs is compiled with zone support may be vulnerable.

There is no CVSS score or EPSS information available, and the vulnerability is not listed in the CISA KEV catalog. The description indicates that a failure during zone finalization can lead to a file‑system hang. No remote exploitation vector is disclosed, so the likelihood of exploitation is unclear, though the potential impact is a denial of service if the error path is triggered.