{"id":"CVE-2026-98279","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: handle lack of space when cleaning up verity items\n\nWhen enable_verity() hits the qgroup limit, rollback_verity() needs its\nown metadata reservation","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: handle lack of space when cleaning up verity items\n\nWhen enable_verity() hits the qgroup limit, rollback_verity() needs its\nown metadata reservation. When the qg…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 146054090b0859b28fc39015c7704ccc3c3a347f < 4b7ecabd87dc40998fe7870d7975279649229a3b","Linux >= 146054090b0859b28fc39015c7704ccc3c3a347f < efa5780b84f066f419a667f6b9542368b2f62074","Linux >= 146054090b0859b28fc39015c7704ccc3c3a347f < 76bf149cd0298544631e756670b89c399c7acbca","Linux 5.15"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:17.783","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98279","references":[{"url":"https://git.kernel.org/stable/c/4b7ecabd87dc40998fe7870d7975279649229a3b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/76bf149cd0298544631e756670b89c399c7acbca","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/efa5780b84f066f419a667f6b9542368b2f62074","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.422Z","slug":"CVE-2026-98279","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: handle lack of space when cleaning up verity items\n\nWhen enable_verity() hits the qgroup limit, rollback_verity() needs its\nown metadata reservation. When the qgroup limit or lack of space refuses\nthe rollback, the whole filesystem is forced read-only even though the\nqgroup limit was for one subvolume only. Also orphan cleanup at the next\nmount fails the same way, so the leftover items are never removed: with\n-EDQUOT the subvolume stays unreachable, and with -ENOSPC on a full\nfilesystem the next read-write mount fails.\n\nStart transactions with btrfs_start_transaction_fallback_global_rsv() in\nbtrfs_orphan_cleanup(), drop_verity_items() and rollback_verity(). Those\ncalls only delete items and free the space in the end, so they may use\nthe global reserve and skip the qgroup limit, which avoids -ENOSPC and\n-EDQUOT.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}