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Fencer Vulns
medium 5.5

CVE-2023-20588 json

Speculative Leaks

published 2023-08-08 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-24767

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.2%
EPSS 11.2% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality.

Patch / fix

  • microsoft windows_10_1507 10.0.10240.20345
  • microsoft windows_10_1607 10.0.14393.6529
  • microsoft windows_10_1809 10.0.17763.5206
  • microsoft windows_10_21h2 10.0.19044.3803
  • microsoft windows_10_22h2 10.0.19045.3803
  • microsoft windows_11_21h2 10.0.22000.2652
  • microsoft windows_11_22h2 10.0.22621.2861
  • microsoft windows_11_23h2 10.0.22631.2861
  • microsoft windows_server_2016 10.0.14393.6529
  • microsoft windows_server_2019 10.0.17763.5206
  • microsoft windows_server_2022_23h2 10.0.25398.584
  • xen Debian 12 4.17.2+76-ge1f9cb16e2-1~deb12u1
  • xen Debian 14, Debian 13 4.17.2+55-g0b56bed864-1
  • linux Debian 12 6.1.52-1
  • linux Debian 14, Debian 13 6.4.13-1

debian advisories DEBIAN-CVE-2023-20588

  • linux Ubuntu 20.04 LTS 5.4.0-163.180
  • linux Ubuntu 22.04 LTS 5.15.0-84.93
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1110.119
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1045.50
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1113.122
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1042.50
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1042.47
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1057.62

ubuntu advisories UBUNTU-CVE-2023-20588

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

  • xen SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4, SLE Micro 5.4 +4 more 4.16.5_08-150400.4.40.1
  • xen SLE Module for Server Applications 15 SP5, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +1 more 4.17.2_08-150500.3.15.1
  • kernel-rt SLE Micro 5.5, Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.18.1
  • kernel-syms-rt Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.18.1
  • kernel-rt_debug Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.18.1
  • kernel-source-rt Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.18.1
  • dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.28.1
  • kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.28.1

suse advisories SUSE-SU-2023:4476-1SUSE-SU-2023:4475-1SUSE-SU-2023:4028-1SUSE-SU-2023:3988-1SUSE-SU-2023:3971-1SUSE-SU-2023:3969-1

  • spectre-meltdown-checker openSUSE Tumbleweed 26.36.0602723-1.1
  • xen openSUSE Tumbleweed 4.17.2_04-1.1

opensuse advisories openSUSE-SU-2026:11242-1openSUSE-SU-2024:13257-1

  • xen Alpine 3.15 4.15.5-r2
  • xen Alpine 3.17, Alpine 3.16 4.16.5-r2
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 4.17.2-r2

alpine advisories ALPINE-CVE-2023-20588

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2023-20588 updated cvss 6.0

hw: amd: division-by-zero may resulting in loss of confidentiality

  • 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 Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    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

11.15% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

  • AMD EPYC™ 7001 Processors
  • AMD Athlon™ 3000 Series Processors with Radeon™ Graphics
  • AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics
  • AMD Athlon™ PRO 3000 Series Processors with Radeon™ Vega Graphics
  • AMD Ryzen™ PRO 3000 Series Processors with Radeon™ Vega Graphics

Classification

Weakness

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.