CVE-2023-52639
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.
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/28bb27824f25f36e5f80229a358d66ee09244082Patch
- https://git.kernel.org/stable/c/5df3b81a567eb565029563f26f374ae3803a1dfcPatch
- https://git.kernel.org/stable/c/f5572c0323cf8b4f1f0618178648a25b8fb8a380Patch
- https://git.kernel.org/stable/c/fe752331d4b361d43cfd0b89534b4b2176057c32Patch
- https://git.kernel.org/stable/c/28bb27824f25f36e5f80229a358d66ee09244082Patch
- https://git.kernel.org/stable/c/5df3b81a567eb565029563f26f374ae3803a1dfcPatch
- https://git.kernel.org/stable/c/f5572c0323cf8b4f1f0618178648a25b8fb8a380Patch
- https://git.kernel.org/stable/c/fe752331d4b361d43cfd0b89534b4b2176057c32Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.