Buffer overflow in AMD 1st Gen Epyc
CVE-2021-26398
Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure Processor) OS memory which may lead to potential arbitrary code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (12.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- AMD 1st Gen Epyc — versions various
- AMD 2nd Gen Epyc — versions Various
- AMD 3rd Gen Epyc — versions various
- AMD Epyc 7001
- AMD Epyc 7001 Firmware
- AMD Epyc 7002
- AMD Epyc 7002 Firmware
- AMD Epyc 7003
- AMD Epyc 7003 Firmware
- AMD Epyc 7232p
Weakness classification (CWE)
References
- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-26398?
- CVE-2021-26398 is a high-severity vulnerability in AMD 1st Gen Epyc, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-01-11.
- How severe is CVE-2021-26398?
- High severity. CVSS v3 base score is 7.8 out of 10.