md/raid1,raid10: fix error-path detection with md_cloned_bio() (CVE-2026-74374) | HOL Guard CVE

High · CVSS 7.5CVE-2026-74374

md/raid1,raid10: fix error-path detection with md_cloned_bio()

Answer in brief

CVE-2026-74374 records a High severity (CVSS 7.5) vulnerability in md/raid1,raid10: fix error-path detection with md_cloned_bio(). 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 Aug 15, 2026Updated Aug 17, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. 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	>=689389a06ce79fdced85b5115717f71c71e623e0 <20fb582c92fd64e5c8bd83c6176264b2794603b7 \|\| >=689389a06ce79fdced85b5115717f71c71e623e0 <811545e0926d02a6a0b1a1258bb5544777c164d4	20fb582c92fd64e5c8bd83c6176264b2794603b7, 811545e0926d02a6a0b1a1258bb5544777c164d4
Linux/Linuxgeneric	4.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 20fb582c92fd64e5c8bd83c6176264b2794603b7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: md/raid1,raid10: fix error-path detection with md_cloned_bio() Detect the error path using md_cloned_bio() instead of relying on r1_bio in raid1 or r10_bio->read_slot in raid10, which may be NULL or -1 after splitting and resubmitting a failed bio. As a result, the error path may not be recognized and memory allocations can incorrectly use GFP_NOIO instead of (GFP_NOIO | __GFP_HIGH), which can lead to a deadlock under memory pressure.

Quoted source text, attributed separately from HOL analysis.