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CVE-2026-80549

8.2 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Move cp cleanup out of not operational The fsm_notoper() routine is called when the device has been lost, and is…

Published Aug 26, 2026EPSS 0.18%

Overview

CVE-2026-80549 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, 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: Move cp cleanup out of not operational

The fsm_notoper() routine is called when the device has been

lost, and is (by definition) no longer operational. Since this

can happen asynchronously from the normal behavior of the

driver, the cleanup may happen when holding other locks

in the calling sequence (notably, the cio subchannel lock).

Push the cleanup of the private->cp resources to a workqueue,

where it can be done out from under that lock sequence and

a future patch can safely manage the locking requirements.

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/0c11f61a876ed6fcca53d442ed3f33ea8362a0f9Refgit.kernel.org/stable/c/4e3301e2a651d742c05914f6074a25b8e41bce19Refgit.kernel.org/stable/c/56100baa0eb7055b1026dfa73e696e8066ff71fdRefgit.kernel.org/stable/c/af1759d8e6e6da9ba94f30a2f92546f406899aa7Refgit.kernel.org/stable/c/c9b85aa2cf73ea645e55e2c2670e0ddebfe1589bRefgit.kernel.org/stable/c/f98a9890ca42f4223d2d4c50e0660af3e012fcb4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80549?

CVE-2026-80549 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-80549?

This vulnerability has a CVSS 3.1 base score of 8.2, 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-2026-80549?

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-2026-80549?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80549 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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