CVE-2026-52968

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.

References

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