4.7

CVE-2023-52639: KVM: s390: vsie: fix race during shadow creation

Analyzed
AliasesUBUNTU-CVE-2023-52639DEBIAN-CVE-2023-52639
Published 03-04-2024Last modified 11-05-2026

Vulnerability summary

CVE-2023-52639 is a medium (CVSS 4.7) vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.7/10
010
Medium · v3.1 (NVD)
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 26 · Related 23
RHSA-2024:3855RHSA-2024:4740RHSA-2024:5257SUSE-SU-2024:1466-1SUSE-SU-2024:1480-1SUSE-SU-2024:1490-1

Timeline

  1. 03-04-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu115 products
  • linux< 4.15.0-231.243 | < 5.4.0-202.222 | < 5.15.0-127.137
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1175.188 | < 5.4.0-1136.146 | < 5.15.0-1073.79
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ a3508fbe9dc6dd3bece0c7bf889cc085a011738c, < 5df3b81a567eb565029563f26f374ae3803a1dfc | ≥ a3508fbe9dc6dd3bece0c7bf889cc085a011738c, < f5572c0323cf8b4f1f0618178648a25b8fb8a380 | ≥ a3508fbe9dc6dd3bece0c7bf889cc085a011738c, < 28bb27824f25f36e5f80229a358d66ee09244082 | ≥ a3508fbe9dc6dd3bece0c7bf889cc085a011738c, < fe752331d4b361d43cfd0b89534b4b2176057c32 | 4.8
  • linux_kernel≥ 4.8, < 6.1.82 | ≥ 6.2, < 6.6.22 | ≥ 6.7, < 6.7.6 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3
Debian1 product
  • linux< 6.1.82-1 | < 6.7.7-1

3 vendors · 118 products

References

25 links
Show all 25 references