VYPR
← All advisories
Medium severity4.7NVD Advisory· Published Apr 3, 2024· Updated Jun 17, 2026

CVE-2023-52639

CVE-2023-52639

Description

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: vsie: fix race during shadow creation

Right now it is possible to see gmap->private being zero in kvm_s390_vsie_gmap_notifier resulting in a crash. This is due to the fact that we add gmap->private == kvm after creation:

static int acquire_gmap_shadow(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) { [...] gmap = gmap_shadow(vcpu->arch.gmap, asce, edat); if (IS_ERR(gmap)) return PTR_ERR(gmap); gmap->private = vcpu->kvm;

Let children inherit the private field of the parent.

Affected products

74

Patches

Vulnerability mechanics

References

4

News mentions

0

No linked articles in our index yet.