KVM: s390: pci: Fix handling of AIF enable without AISB (CVE-2026-68454) | HOL Guard CVE

High · CVSS 8.8CVE-2026-68454

KVM: s390: pci: Fix handling of AIF enable without AISB

Answer in brief

CVE-2026-68454 records a High severity (CVSS 8.8) vulnerability in KVM: s390: pci: Fix handling of AIF enable without AISB. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Aug 17, 2026Source checked Sep 28, 2026First seen by HOL Aug 13, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <f887df91826e72b570c5e9298e66dd929f09edde \|\| >=3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <3ef3190e30601b2688bdc64169b938b8d7f42010 \|\| >=3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <d48b9b096d11e31690c0a4988f65f21b64c01b2a \|\| >=3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <df72596278b0e22dac5ef2881e9221a3a2c4ed11 \|\| >=3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <124a3769c43713a11a93a821b313e61ad5110cb8 \|\| >=3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <3e3aa6da87d30a0064a17b836685cd43c90a3572	f887df91826e72b570c5e9298e66dd929f09edde, 3ef3190e30601b2688bdc64169b938b8d7f42010, d48b9b096d11e31690c0a4988f65f21b64c01b2a, df72596278b0e22dac5ef2881e9221a3a2c4ed11, 124a3769c43713a11a93a821b313e61ad5110cb8, 3e3aa6da87d30a0064a17b836685cd43c90a3572
Linux/Linuxgeneric	6.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f887df91826e72b570c5e9298e66dd929f09edde if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Upstream source 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)).

Quoted source text, attributed separately from HOL analysis.