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CVE-2026-80552

8.8 · HIGH

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 th…

Published Aug 26, 2026EPSS 0.18%

Overview

CVE-2026-80552 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3acbedf5c0b8e0971f0de423c05cc02bbf6ddb99Refgit.kernel.org/stable/c/649badf3a2fd8929e40198603a2cb21b74c21700Refgit.kernel.org/stable/c/79ea5e0c4c8a9842ae85f45062d947b3297dfc07Refgit.kernel.org/stable/c/988d9b5be3c2c4baf9457ce8e11b477e13eb9fcfRefgit.kernel.org/stable/c/9f5f9a78fedc45bc29d6a0a64e3a3472361afae5Refgit.kernel.org/stable/c/d3b1e38404b22df5a1f93019f2bb656feaad5ae3Refgit.kernel.org/stable/c/d597fa1273802941c7801202135976fecc29672b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80552?

CVE-2026-80552 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-80552?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-80552?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-80552?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80552 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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