md/raid1: create serial pool adding rdev to array with serialize_policy=1 (CVE-2026-90385) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90385

md/raid1: create serial pool adding rdev to array with serialize_policy=1

Answer in brief

CVE-2026-90385 records a Unknown severity vulnerability in md/raid1: create serial pool adding rdev to array with serialize_policy=1. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=69b00b5bb23552d43e8bbed73ef6624604bb94a2 <f9e4364449f7ca6917f3599eb32064dba5b7b147 \|\| >=69b00b5bb23552d43e8bbed73ef6624604bb94a2 <37f11973c3eb72a5eb061082cad529bb6939c24f \|\| >=69b00b5bb23552d43e8bbed73ef6624604bb94a2 <c02d675e81468003e4f2253b616c53729070d712 \|\| >=69b00b5bb23552d43e8bbed73ef6624604bb94a2 <140234b2380ffb8ffb0cfc46fee0e822f43adef7	f9e4364449f7ca6917f3599eb32064dba5b7b147, 37f11973c3eb72a5eb061082cad529bb6939c24f, c02d675e81468003e4f2253b616c53729070d712, 140234b2380ffb8ffb0cfc46fee0e822f43adef7
Linux/Linuxgeneric	5.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f9e4364449f7ca6917f3599eb32064dba5b7b147 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: md/raid1: create serial pool adding rdev to array with serialize_policy=1 The following bug has been observed with kernel 7.1.3 after adding a new rdev to an existing RAID1 array with serialize_policy enabled: Oops: 0002 [#1] CPU: 0 UID: 0 PID: 19639 Comm: ext4lazyinit Not tainted 7.1.3-1-default RIP: _raw_spin_lock_irqsave+0x27/0x50 CR2: 0000000000004960 Call Trace: wait_for_serialization+0xb9/0x260 [raid1] raid1_make_request+0x762/0xaff [raid1] md_handle_request+0x1c9/0x2e0 [md_mod] The raid1.c code calls wait_for_serialization() if the MD_SERIALIZE_POLICY is set, and wait_for_serialization assumes that rdev->serial is initialized. Normally this will be the case for arrays that have the serialize_policy sysfs attribute set to 1. But when a new rdev is added to an existing array in bind_rdev_to_array(), the condition at mddev_create_serial_pool() causes creation of rdev->serial to be skipped. Fix it.

Quoted source text, attributed separately from HOL analysis.