{"id":"CVE-2026-90278","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: wait for behind writes before destroying bitmap\n\n__md_stop() destroyed the bitmap before calling mddev_detach()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: wait for behind writes before destroying bitmap\n\n__md_stop() destroyed the bitmap before calling mddev_detach(). That made\nmddev_detach() skip bitmap_ops->wait_behi…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc < 73881ff7a75913f919a1ce9d9571bfaab8e8588d","Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc < 4224dccd325a9380e8edfb66aad8bb5771c94222","Linux >= 5ab829f1971dc99f2aac10846c378e67fc875abc < 2a79365b2278f16e163e4024086105693b421601","Linux 6.18"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:24.460","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90278","references":[{"url":"https://git.kernel.org/stable/c/2a79365b2278f16e163e4024086105693b421601","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4224dccd325a9380e8edfb66aad8bb5771c94222","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/73881ff7a75913f919a1ce9d9571bfaab8e8588d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.838Z","epss":0.00198,"epssPercentile":0.0986,"slug":"CVE-2026-90278","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmd: wait for behind writes before destroying bitmap\n\n__md_stop() destroyed the bitmap before calling mddev_detach(). That made\nmddev_detach() skip bitmap_ops->wait_behind_writes(), because the bitmap\nwas already disconnected from mddev.\n\nThis was still safe for the legacy bitmap because bitmap_destroy() waits\nfor behind writes itself. llbitmap keeps that wait in its\n->wait_behind_writes() operation instead, while ->destroy() tears down the\nllbitmap storage. With the old ordering, RAID1 behind-write completions\ncould still run after llbitmap storage had been freed.\n\nCall mddev_detach() before md_bitmap_destroy() so the common detach path\ncan wait for behind writes while the bitmap is still alive. Only destroy\nthe bitmap after those users are gone.\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":[]}