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Fixed

LIN1023-4502 : Security Advisory - linux - CVE-2023-52639

Created: Apr 3, 2024 Updated: Apr 20, 2024

Resolved Date: Apr 19, 2024

Found In Version: 10.23.30.1

Severity: Standard

Applicable for: Wind River Linux LTS 23

Component/s: Kernel

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.

CREATE(Triage):(User=admin) [CVE-2023-52639 (https://nvd.nist.gov/vuln/detail/CVE-2023-52639)

CVEs

CVE-2023-52639