CVE-2026-52968

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux73f91b004321f2510fa79e66035dbbf1870fcf56 < 31a9d9f9942885aae356a1a57c79e82c5b5b0828affected
LinuxLinux73f91b004321f2510fa79e66035dbbf1870fcf56 < a99a25db131ece5e6c0f7632da606de631efe4f2affected
LinuxLinux73f91b004321f2510fa79e66035dbbf1870fcf56 < 11b8ff5b930b351dd1f6f088dce0beb027ac92d0affected
LinuxLinux73f91b004321f2510fa79e66035dbbf1870fcf56 < b22a2da8792a7bfe743c1a922e77fa499ddedbe8affected
LinuxLinux73f91b004321f2510fa79e66035dbbf1870fcf56 < e7216651b94e92e5433fb2f54b77864642b4ea48affected
LinuxLinux73f91b004321f2510fa79e66035dbbf1870fcf56 < 16d990a15491cf76cd6eef0846e1b4100e63261aaffected
LinuxLinux6.0affected
LinuxLinux0 < 6.0unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References