Linux Linux Kernel Vulnerability Rated 7.1 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-90401

Key Details

CVE	CVE-2026-90401
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Exploitation prediction (EPSS)	0.15% probability of exploitation in the next 30 days (4% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90401
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90401

Source

Reference

NVD

CVE