PT-2023-1485 · Amd · Amd Secure Encrypted Virtualization (Sev) Firmware

CVE-2021-26404 · Published 2023-01-10 · Updated 2025-04-08

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions AMD Secure Encrypted Virtualization (SEV) firmware (affected versions not specified)

Description The issue is related to improper input validation and bounds checking in the SEV firmware, which may cause a buffer overflow in memory. This could potentially lead to information disclosure. The vulnerability is associated with the implementation of AMD Secure Encrypted Virtualization technology in AMD processor microcode.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Buffer Overflow

Weakness Enumeration

CWE-20

CWE-119

Related Identifiers

BDU:2023-00895

CVE-2021-26404

Affected Products

Amd Secure Encrypted Virtualization (Sev) Firmware

References · 7

• https://osv.dev/vulnerability/CVE-2021-26404 · Vendor Advisory
• https://amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26404 · Security Note
• https://bdu.fstec.ru/vul/2023-00895 · Security Note
• https://support.lenovo.com/us/en/product_security/LEN-87730 · Note
• https://amd.com/en/corporate/product-security/bulletin/amd-sb-1032 · Note
• https://t.me/cvenotify/118378 · Telegram Post