netfs: Fix barriering when walking subrequest list (CVE-2026-72355) | HOL Guard CVE

Critical · CVSS 9.8CVE-2026-72355

netfs: Fix barriering when walking subrequest list

Answer in brief

CVE-2026-72355 records a Critical severity (CVSS 9.8) vulnerability in netfs: Fix barriering when walking subrequest list. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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 Sep 21, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Sep 21, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=288ace2f57c9d06dd2e42bd80d03747d879a4068 <be47c047250671c9225c0319ca4695be9b391c59 \|\| >=288ace2f57c9d06dd2e42bd80d03747d879a4068 <5c6ce05e406520290c1d89da97fb3cd70c09137d	be47c047250671c9225c0319ca4695be9b391c59, 5c6ce05e406520290c1d89da97fb3cd70c09137d
Linux/Linuxgeneric	6.10	Not reported
Linux/Linuxgeneric	>=288ace2f57c9d06dd2e42bd80d03747d879a4068 <4cca4b44e561a19c77cb1949ae6846da0539db40 \|\| >=288ace2f57c9d06dd2e42bd80d03747d879a4068 <be47c047250671c9225c0319ca4695be9b391c59 \|\| >=288ace2f57c9d06dd2e42bd80d03747d879a4068 <5c6ce05e406520290c1d89da97fb3cd70c09137d	4cca4b44e561a19c77cb1949ae6846da0539db40, be47c047250671c9225c0319ca4695be9b391c59, 5c6ce05e406520290c1d89da97fb3cd70c09137d

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to be47c047250671c9225c0319ca4695be9b391c59; Linux/Linux to 4cca4b44e561a19c77cb1949ae6846da0539db40 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
Sep 21, 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: netfs: Fix barriering when walking subrequest list Fix the barriering used when walking the subrequest list in retry as there's a possibility of seeing a subreq that's just been added by the application thread.

Quoted source text, attributed separately from HOL analysis.