CVE-2023-52639

medium

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.

References

https://git.kernel.org/stable/c/fe752331d4b361d43cfd0b89534b4b2176057c32

https://git.kernel.org/stable/c/f5572c0323cf8b4f1f0618178648a25b8fb8a380

https://git.kernel.org/stable/c/5df3b81a567eb565029563f26f374ae3803a1dfc

https://git.kernel.org/stable/c/28bb27824f25f36e5f80229a358d66ee09244082

Details

Source: Mitre, NVD

Published: 2024-04-03

Updated: 2024-04-03

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium