CVE-2026-90278

CVE CVE-2026-90278EUVD EUVD-2026-81871Published 2026-09-17T16:08:09.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 7.3-rc1; 5ab829f1971dc99f2aac10846c378e67fc875abc <4224dccd325a9380e8edfb66aad8bb5771c94222; patch: 0; 5ab829f1971dc99f2aac10846c378e67fc875abc <2a79365b2278f16e163e4024086105693b421601; patch: 6.18.52; patch: 7.2.6; 6.18; 5ab829f1971dc99f2aac10846c378e67fc875abc <73881ff7a75913f919a1ce9d9571bfaab8e8588d

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.