CVE-2026-89646

CVE-2026-89646 affects the Linux kernel Ceph filesystem (cephfs) . In ceph_dirty_folio(), a wrbuffer reference (via ihold()) is taken on each newly dirtied folio and is only released by writepages_finish(). When ceph_submit_write() aborts—such as during unmount when ceph_inc_osd_stopping_blocker(...