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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (37.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
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
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3011.html (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.