CVE-2026-80552

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

CVE-2026-80552 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-80552, released August 27, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.8

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0013

2nd percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 12.15 (bookworm)	6.1.187-1	DEBIAN-CVE-2026-80552	Aug 27, 2026
linux · Debian 13.5 (trixie)	6.12.105-1	DEBIAN-CVE-2026-80552	Aug 27, 2026
linux · Debian 14	7.1.10-1	DEBIAN-CVE-2026-80552	Aug 27, 2026
linux-6.12 · Debian 12.15 (bookworm)	6.12.107-1~deb12u1	DEBIAN-CVE-2026-80552	Aug 27, 2026

Details

Published
August 26, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80552

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-80552">CVE-2026-80552 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.