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Vulnerability record · CVE-2026-52968 · published 24 June 2026

CVE-2026-52968: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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.

7.1 CVSS 3.1 High EPSS 0.18% · top 93.6% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
18 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/11b8ff5b930b351dd1f6f088dce0beb027ac92d0 Patch
https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a Patch
https://git.kernel.org/stable/c/31a9d9f9942885aae356a1a57c79e82c5b5b0828 Patch
https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2 Patch
https://git.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8 Patch
https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-52968), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.