s390/vfio_ccw: Ensure index for read/write regions are within range (CVE-2026-80552) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80552

s390/vfio_ccw: Ensure index for read/write regions are within range

Answer in brief

CVE-2026-80552 records a Unknown severity vulnerability in s390/vfio_ccw: Ensure index for read/write regions are within range. 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	>=db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 <d3b1e38404b22df5a1f93019f2bb656feaad5ae3 \|\| >=db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 <79ea5e0c4c8a9842ae85f45062d947b3297dfc07 \|\| >=db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 <d597fa1273802941c7801202135976fecc29672b \|\| >=db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 <649badf3a2fd8929e40198603a2cb21b74c21700 \|\| >=db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 <988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf \|\| >=db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 <9f5f9a78fedc45bc29d6a0a64e3a3472361afae5	d3b1e38404b22df5a1f93019f2bb656feaad5ae3, 79ea5e0c4c8a9842ae85f45062d947b3297dfc07, d597fa1273802941c7801202135976fecc29672b, 649badf3a2fd8929e40198603a2cb21b74c21700, 988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf, 9f5f9a78fedc45bc29d6a0a64e3a3472361afae5
Linux/Linuxgeneric	5.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d3b1e38404b22df5a1f93019f2bb656feaad5ae3 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: Ensure index for read/write regions are within range The introduction of the capability chain rightly clamped the region indexes to the range of the capabilities itself, but neglected to do so for the existing read/write regions which should also be enforced.

Quoted source text, attributed separately from HOL analysis.