CVE-2026-90278md: wait for behind writes before destroying bitmap
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: md: wait for behind writes before destroying bitmap __md_stop() destroyed the bitmap before calling mddev_detach(). That made mddev_detach() skip bitmap_ops->wait_behind_writes(), because the bitmap was already disconnected from mddev. This was still safe for the legacy bitmap because bitmap_destroy() waits for behind writes itself. llbitmap keeps that wait in its ->wait_behind_writes() operation instead, while ->destroy() tears down the llbitmap storage. With the old ordering, RAID1 behind-write completions could still run after llbitmap storage had been freed. Call mddev_detach() before md_bitmap_destroy() so the common detach path can wait for behind writes while the bitmap is still alive. Only destroy the bitmap after those users are gone.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5ab829f1971dc99f2aac10846c378e67fc875abc before 73881ff7a75913f919a1ce9d9571bfaab8e8588d; from 5ab829f1971dc99f2aac10846c378e67fc875abc before 4224dccd325a9380e8edfb66aad8bb5771c94222; 5ab829f1971dc99f2aac10846c378e67fc875abc builds before 2a79365b2278f16e163e4024086105693b421601 | CNA record |
References
- https://git.kernel.org/stable/c/73881ff7a75913f919a1ce9d9571bfaab8e8588d
- https://git.kernel.org/stable/c/4224dccd325a9380e8edfb66aad8bb5771c94222
- https://git.kernel.org/stable/c/2a79365b2278f16e163e4024086105693b421601
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.