What’s Vulnerable › Vulnerabilities

CVE-2026-80684: KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

• Severity: critical (CVSS 9.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-10-16

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.

Affected products

• Linux kernel: 6.0 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0a95abe964400771ad82b027d7b84a0d183cd0db
• https://git.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3fa
• https://git.kernel.org/stable/c/96099486b63985801c9c6ef22505e9aa635b2d20
• https://git.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3
• https://git.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7ed
• https://git.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9

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