s390/vfio_ccw: Implement a crw lock

Answer in brief

CVE-2026-80547 records a Unknown severity vulnerability in s390/vfio_ccw: Implement a crw lock. 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 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 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	>=3f02cb2fd9d2d9e8762102886e3e4b51285797ee <49fa26b0df009dc1f420980bd71780e70615b83b \|\| >=3f02cb2fd9d2d9e8762102886e3e4b51285797ee <7902be374cbfc11c3435e1e87bf22195bf06a558 \|\| >=3f02cb2fd9d2d9e8762102886e3e4b51285797ee <c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9 \|\| >=3f02cb2fd9d2d9e8762102886e3e4b51285797ee <16b0798024c0e9117e395829ddbbe70981c79d9c	49fa26b0df009dc1f420980bd71780e70615b83b, 7902be374cbfc11c3435e1e87bf22195bf06a558, c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9, 16b0798024c0e9117e395829ddbbe70981c79d9c
Linux/Linuxgeneric	5.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 49fa26b0df009dc1f420980bd71780e70615b83b if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Implement a crw lock Unlike the channel_program struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a lock to manage the list of those payloads, to ensure they are read cohesively.

Quoted source text, attributed separately from HOL analysis.