What’s Vulnerable › Vulnerabilities

CVE-2026-68454: KVM: s390: pci: Fix handling of AIF enable without AISB

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-10-19
• Weakness: CWE-20

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix handling of AIF enable without AISB When a guest seeks to register IRQs without a summary bit specified, ensure that the associated GAITE then stores 0 for the guest AISB location instead of virt_to_phys(page_address(NULL)).

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/124a3769c43713a11a93a821b313e61ad5110cb8
• https://git.kernel.org/stable/c/3e3aa6da87d30a0064a17b836685cd43c90a3572
• https://git.kernel.org/stable/c/3ef3190e30601b2688bdc64169b938b8d7f42010
• https://git.kernel.org/stable/c/d48b9b096d11e31690c0a4988f65f21b64c01b2a
• https://git.kernel.org/stable/c/df72596278b0e22dac5ef2881e9221a3a2c4ed11
• https://git.kernel.org/stable/c/f887df91826e72b570c5e9298e66dd929f09edde

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