CVE-2026-90401

CVE CVE-2026-90401EUVD EUVD-2026-82062Published 2026-09-17T16:09:31.000ZLast changed 2026-09-18T17:55:08.000ZCVSS 7.1

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: md: remove REQ_NOWAIT support from raid1/10/456 REQ_NOWAIT support in md personalities that can block internally is fundamentally incomplete. While reads can avoid some blocking paths, write requests can still encounter cases where one mirror succeeds while another returns -EAGAIN. At that point md cannot distinguish queue pressure from a real device failure, so it can neither record a bad block nor safely retry the write without REQ_NOWAIT, leaving mirrors with divergent data. Rather than continue advertising REQ_NOWAIT support for personalities that cannot implement it correctly, remove it from raid1, raid10 and raid456. Keep REQ_NOWAIT for linear and raid0, which only remap bios to their underlying devices; stacked limits will still clear the feature if any component device lacks REQ_NOWAIT support.

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: 0; 5.15.111 <5.16; 39db562b3fedb93978a7e42dd216b306740959f8; f51d46d0e7cb5b8494aa534d276a9d8915a2443d <9bb9504e2d8f3d22ef12d51c333dd499f402dc8f; 5.17; patch: 7.3-rc1; patch: 7.2.6; f51d46d0e7cb5b8494aa534d276a9d8915a2443d <3fe5b7c9fb72ccc29bfd0f955b124892af7e3674

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

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