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Public proof of conceptFix available

CVE-2023-20593

A public proof of concept exists; no exploitation attested.

  • Published2023-07-24
  • WeaknessCWE-209

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.

Timeline

dates in UTC
  1. 2023-07-2420:15CVE publishedNVD

Versions per branch

NVD
Xen
BranchAffectedFixed in
4.14= 4.14.0no fix published
4.15= 4.15.0no fix published
4.16= 4.16.0no fix published
4.17= 4.17.0no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
11.0= 11.0no fix published
12.0= 12.0no fix published
Amd athlon gold 7220u firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

68 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA8 products

As AMD, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • AMD Ryzen™ 3000 Series Desktop Processors “Matisse” AM4other versions: affected

    package AGESAplatforms: x86

    Affected
    • = variousno fix stated
  • AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics “Renoir” AM4other versions: affected

    package AGESAplatforms: x86

    Affected
    • = variousno fix stated
  • AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDTother versions: affected

    package AGESAplatforms: x86

    Affected
    • = variousno fix stated
  • AMD Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS SP3other versions: affected

    package AGESAplatforms: x86

    Affected
    • = variousno fix stated
  • AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Lucienne”other versions: affected

    package AGESAplatforms: x86

    Affected
    • = variousno fix stated
  • AMD Ryzen™ 4000 Series Mobile processors with Radeon™ Graphics “Renoir”other versions: affected

    package AGESAplatforms: x86

    Affected
    • = variousno fix stated

2 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-07-24

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • amd64-microcodeTuxCare:Ubuntu:18.04all versions · fixed in 3.20230719.1ubuntu0.18.04.1+tuxcare.els1
  • amd64-microcodeTuxCare:Ubuntu:18.04all versions · fixed in 3.20230808.1ubuntu0.18.04.1+tuxcare.els1
  • amd64-microcodeTuxCare:Ubuntu:16.04all versions · fixed in 3.20230719.1ubuntu0.16.04.2+tuxcare.els1
  • amd64-microcodeTuxCare:Ubuntu:16.04all versions · fixed in 3.20230808.1ubuntu0.16.04.2+tuxcare.els1
  • amd64-microcodeDebian:14all versions · fixed in 3.20230719.1
  • amd64-microcodeDebian:13all versions · fixed in 3.20230719.1
  • amd64-microcodeDebian:12all versions · fixed in 3.20230719.1~deb12u1
  • amd64-microcodeDebian:11all versions · fixed in 3.20230719.1~deb11u1

324 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-20593 Red Hat Product Security1,519 products fixed

    hw: amd: Cross-Process Information Leak

  • ICSA-25-105-08 CISA2 known affected

    ABB M2M Gateway

    ABB M2M Gateway ARM600, firmware versions = 4.1.2 <= 5.0.3 · ABB M2M Gateway SW, software versions = 5.0.1 <= 5.0.3

  • ICSA-24-046-11 CISA11 known affected

    Siemens SCALANCE XCM-/XRM-300

    SCALANCE XCH328 (6GK5328-4TS01-2EC2) · SCALANCE XCM324 (6GK5324-8TS01-2AC2) · SCALANCE XCM328 (6GK5328-4TS01-2AC2) · +8 more

  • SSA-806742 Siemens ProductCERT11 known affected

    SSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4

    SCALANCE XCH328 (6GK5328-4TS01-2EC2) · SCALANCE XCM324 (6GK5324-8TS01-2AC2) · SCALANCE XCM328 (6GK5328-4TS01-2AC2) · +8 more

  • RHSA-2024:0561 Red Hat Product Security6 products fixed

    Red Hat Security Advisory: linux-firmware security update

  • RHSA-2024:0403 Red Hat Product Security97 products fixed

    Red Hat Security Advisory: kernel security update

24 more advisories

Full record on NVD

Fix

  1. Vendor fix Siemens ProductCERT SSA-806742 · 10 productsUpdate to V2.4 or later version
  2. Vendor fix CISA ICSA-24-046-11 · 10 productsUpdate to V2.4 or later version
  3. Vendor fix Red Hat Product Security RHSA-2024:0561 · 6 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2024:0403 · 97 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  5. Vendor fix Red Hat Product Security RHSA-2023:7401 · 22 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  6. Workaround from the vendor Red Hat Product Security RHSA-2024:0561 · 66 productsMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Published
2023-07-24
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-20593?

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.

Is CVE-2023-20593 actively exploited?

A proof-of-concept exploit exists for CVE-2023-20593, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-20593?

CVE-2023-20593 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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