Buffer overflow in Amd 3rd Gen Epyc™ Processors
CVE-2023-31355
Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC seed potentially allowing reading of memory from a decommissioned guest.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Amd 3rd Gen Epyc™ Processors — versions various
- Amd 4th Gen Epyc™ Processors — versions various
- Amd Epyc™ Embedded 7003 — versions various
- Amd Epyc™ Embedded 9003 — versions various
- Amd Epyc_7203
- Amd Epyc_7203_firmware
- Amd Epyc_7203p
- Amd Epyc_7203p_firmware
- Amd Epyc_72f3
- Amd Epyc_72f3_firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@amd.com (vendor-advisory, Broken Link)
Frequently asked questions
- What is CVE-2023-31355?
- CVE-2023-31355 is a medium-severity vulnerability in Amd 3rd Gen Epyc™ Processors, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.0/10. Published 2024-08-05.
- How severe is CVE-2023-31355?
- Medium severity. CVSS v3 base score is 6.0 out of 10.
- Is CVE-2023-31355 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.