CVE-2026-52968
Published Jun 24, 2026
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.
EPSS — Exploit Prediction
0.0018
Probability of exploitation
0.08%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other 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
https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48
Frequently Asked Questions
What is CVE-2026-52968? +
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.
How do I check if I'm vulnerable to CVE-2026-52968? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.