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CVE-2026-52968

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic kvm_s390_pci_aif_enable(), kvm_s390_pci_aif_di…

Published Jun 24, 2026CWE-125EPSS 0.18%

Overview

CVE-2026-52968 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, 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:

KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic

kvm_s390_pci_aif_enable(), kvm_s390_pci_aif_disable(), and

aen_host_forward() index the GAIT by manually multiplying the index

with sizeof(struct zpci_gaite).

Since aift->gait is already a struct zpci_gaite pointer, this

double-scales the offset, accessing element aisb*16 instead of aisb.

This causes out-of-bounds accesses when aisb >= 32 (with

ZPCI_NR_DEVICES=512)

Fix by removing the erroneous sizeof multiplication.

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/11b8ff5b930b351dd1f6f088dce0beb027ac92d0Refgit.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261aRefgit.kernel.org/stable/c/31a9d9f9942885aae356a1a57c79e82c5b5b0828Refgit.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2Refgit.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8Refgit.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52968?

CVE-2026-52968 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-52968?

This vulnerability has a CVSS 3.1 base score of 8.8, 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-2026-52968?

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-2026-52968?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52968 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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