Skip to content
Fencer Vulns
medium 4.7

CVE-2023-52639 json

KVM: s390: vsie: fix race during shadow creation

published 2024-04-03 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57263

cvss
4.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

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.

Patch / fix

  • Linux Linux 6.1.82, 6.6.22, 6.7.6, 6.8
  • linux Debian 12 6.1.82-1
  • linux Debian 14, Debian 13 6.7.7-1

debian advisories DEBIAN-CVE-2023-52639

  • linux Ubuntu 20.04 LTS 5.4.0-202.222
  • linux Ubuntu 22.04 LTS 5.15.0-127.137
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1136.146
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1073.79
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1140.149
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1072.80
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1070.76
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1083.88

ubuntu advisories UBUNTU-CVE-2023-52639

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • perf RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • bpftool RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • kernel-core RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • kernel-tools RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • python3-perf RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • kernel-modules RHEL 9.0 E4S 5.14.0-70.112.1.el9_0
  • kernel-zfcpdump RHEL 9.0 E4S 5.14.0-70.112.1.el9_0

red hat advisories RHSA-2024:5257RHSA-2024:4740RHSA-2024:3855

  • kernel-syms SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.216.1
  • kernel-source SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.216.1
  • kernel-default SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +2 more 4.12.14-122.216.1
  • kernel-obs-build SLE Software Development Kit 12 SP5 4.12.14-122.216.1
  • kernel-rt SLE Real Time 12 SP5 4.12.14-10.182.1
  • kernel-syms-rt SLE Real Time 12 SP5 4.12.14-10.182.1
  • kernel-rt_debug SLE Real Time 12 SP5 4.12.14-10.182.1
  • kernel-source-rt SLE Real Time 12 SP5 4.12.14-10.182.1

suse advisories SUSE-SU-2024:1870-1SUSE-SU-2024:1646-1SUSE-SU-2024:1643-1SUSE-SU-2024:1490-1SUSE-SU-2024:1480-1SUSE-SU-2024:1466-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-52639 updated cvss 4.7

kernel: KVM: s390: vsie: fix race during shadow creation

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.64.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.64.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.64.1.el8_8
    fixed: vendor fix RHSA-2024:4740
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.69.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.69.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.69.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.69.1.el9_2
    fixed: vendor fix RHSA-2024:3855
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.112.1.el9_0, kernel-devel-matched 5.14.0-70.112.1.el9_0, kernel-debug-devel-matched 5.14.0-70.112.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.112.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.112.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.112.1.el9_0, +2 more
    fixed: vendor fix RHSA-2024:5257
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.69.1.el9_2, rtla 5.14.0-284.69.1.el9_2, kernel-devel-matched 5.14.0-284.69.1.el9_2, kernel-64k-devel-matched 5.14.0-284.69.1.el9_2, kernel-debug-devel-matched 5.14.0-284.69.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.69.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:3855
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.112.1.el9_0, bpftool 5.14.0-70.112.1.el9_0, kernel-core 5.14.0-70.112.1.el9_0, kernel-tools 5.14.0-70.112.1.el9_0, python3-perf 5.14.0-70.112.1.el9_0, kernel-modules 5.14.0-70.112.1.el9_0, +14 more
    fixed: vendor fix RHSA-2024:5257
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.64.1.el8_8, kernel 4.18.0-477.64.1.el8_8, bpftool 4.18.0-477.64.1.el8_8, kernel-core 4.18.0-477.64.1.el8_8, kernel-tools 4.18.0-477.64.1.el8_8, python3-perf 4.18.0-477.64.1.el8_8, +15 more
    fixed: vendor fix RHSA-2024:4740
show 2 more
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.69.1.el9_2, kernel 5.14.0-284.69.1.el9_2, kernel-64k 5.14.0-284.69.1.el9_2, kernel-core 5.14.0-284.69.1.el9_2, kernel-tools 5.14.0-284.69.1.el9_2, python3-perf 5.14.0-284.69.1.el9_2, +28 more
    fixed: vendor fix RHSA-2024:3855
  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.69.1.el9_2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.