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CVE-2026-80684

9.3 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix NULL dereference on AIBV allocation failure The airq_iv_create() can return NULL on failure, but the return…

Published Aug 28, 2026EPSS 0.20%

Overview

CVE-2026-80684 is a critical-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

The airq_iv_create() can return NULL on failure, but the return value was

never checked. If it fails, zdev->aibv will be NULL and fail when

dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the

previously allocated AISB bit and zdev->aisb on failure.

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/0a95abe964400771ad82b027d7b84a0d183cd0dbRefgit.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3faRefgit.kernel.org/stable/c/96099486b63985801c9c6ef22505e9aa635b2d20Refgit.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3Refgit.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7edRefgit.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80684?

CVE-2026-80684 is a critical-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

How severe is CVE-2026-80684?

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80684?

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-2026-80684?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80684 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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