CVE-2023-20593 — Information Exposure Through an Error Message in AMD 2nd Gen AMD EPYC™ Processors

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

• Documented patch — www.openwall.com (NIST National Vulnerability Database)
• Documented patch — www.openwall.com (NIST National Vulnerability Database)
• Documented patch — xenbits.xen.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (AMD 2nd Gen AMD EPYC™ Processors, AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT, AMD AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics “Renoir” AM4…).
2. Apply the fixed version or the patch documented under Remediation.
3. EPSS ahead of 92% of scored CVEs: prioritize it in the patch queue.
4. Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-209 · Information Exposure Through an Error Message

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
• Look for anomalous data read/export volumes and access to sensitive records.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · amd/ryzen™ 3000 series desktop processors “matisse” am4, amd/amd ryzen™ 4000 series desktop processors with radeon™ grap
  Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 14, 2026
• Fix documented
  Oct 14, 2026 · NIST National Vulnerability Database
• Affected products added · xen/xen, debian/debian linux, amd/ryzen 3 3100 firmware, amd/ryzen 3 3300x firmware, amd/ryzen 5 3500 firmware, amd/ryze
  Oct 14, 2026 · NIST National Vulnerability Database
• CVSS changed · 5.5
  Oct 14, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 14, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 14, 2026 · Alertas do Telegram
• 2023
• CVE published
  Jul 24, 2023 · AMD

Source activity

Repeated readings are counted rather than listed.

• 1× References added · Oct 14, 2026 – Oct 14, 2026
• 1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

35 on the record

• www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7008
  Vendor Advisory, vendor-advisory, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/31/2
  Mailing List, Mitigation, Patch, Third Party Advisory, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/26/1
  Mailing List, Mitigation, Patch, Third Party Advisory, NIST National Vulnerability Database
• xenbits.xen.org/xsa/advisory-433.html
  Mitigation, Patch, Vendor Advisory, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/13
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/15
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/5
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/09/22/11
  NIST National Vulnerability Database
• www.debian.org/security/2023/dsa-5462
  Third Party Advisory, NIST National Vulnerability Database
• lists.debian.org/debian-lts-announce/2023/07/msg00030.html
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/24/3
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/12
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/08/08/8
  NIST National Vulnerability Database
• lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HKKYIK
  NIST National Vulnerability Database
• lists.debian.org/debian-lts-announce/2023/07/msg00033.html
  Mailing List, Third Party Advisory, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/14
  Mailing List, NIST National Vulnerability Database
• lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CP6WQO
  NIST National Vulnerability Database
• seclists.org/fulldisclosure/2023/Jul/43
  Not Applicable, NIST National Vulnerability Database
• www.debian.org/security/2023/dsa-5459
  Third Party Advisory, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/09/25/4
  NIST National Vulnerability Database
• lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SD2G74
  NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20240531-0004/
  NIST National Vulnerability Database
• www.debian.org/security/2023/dsa-5461
  Third Party Advisory, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/1
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/09/25/7
  NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/6
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/08/16/5
  NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/08/08/7
  NIST National Vulnerability Database
• lists.debian.org/debian-lts-announce/2023/08/msg00001.html
  NIST National Vulnerability Database
• cmpxchg8b.com/zenbleed.html
  Exploit, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/08/16/4
  NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/09/22/9
  NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/17
  Mailing List, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/08/08/6
  NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2023/07/25/16
  Mailing List, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• High CVE-2026-12996 A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote... Jul 30, 2026
• Medium CVE-2026-14355 ext/openssl: Memory corruption in openssl_encrypt with AES-WRAP-PAD Jul 3, 2026
• Medium CVE-2026-56968 Use of Uninitialized Resource in Gnu Sasl Jun 23, 2026
• High CVE-2026-49975 Apache HTTP Server: mod_http2 denial of service Jun 8, 2026
• High CVE-2026-9256 NGINX ngx_http_rewrite_module vulnerability May 22, 2026
• High CVE-2026-23558 grant table v2 race in status page mapping May 19, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-20593 is "Information Exposure Through an Error Message in AMD 2nd Gen AMD EPYC™ Processors", rated Medium. It affects 2nd Gen AMD EPYC™ Processors (AMD); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 5.19% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.

Sign in or create an account to comment and suggest corrections.