Race Condition Affecting kernel-64kb package, versions <5.14.21-150500.55.59.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-SLES155-KERNEL64KB-6747995
  • published1 May 2024
  • disclosed30 Apr 2024

Introduced: 30 Apr 2024

CVE-2023-52639  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 kernel-64kb to version 5.14.21-150500.55.59.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64kb package and not the kernel-64kb package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

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 Base Scores

version 3.1