PT-2026-40387 · Amd · Sev-Snp

Published 2026-05-12 · Updated 2026-05-13 · CVE-2025-61971

Positive Technologies (AI Summary)

CVSS v4.0

5.9

Medium

Base vector

AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions AMD SEV-SNP (affected versions not specified)

Description Missing lock bit protection for NBIO (North Bridge I/O) registers could allow a local attacker with administrative privileges to modify MMIO (Memory Mapped I/O) routing configurations. This could potentially lead to a loss of integrity for SEV-SNP guests.

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

Weakness Enumeration

CWE-1233

Related Identifiers

CVE-2025-61971

Affected Products

Sev-Snp

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2025-61971 · Security Note
• https://twitter.com/shw3ta_shinde/status/2054243957719065064 · Twitter Post
• https://amd.com/en/resources/product-security/bulletin/AMD-SB-3030.html · Note
• https://t.me/CVEtracker/53597 · Telegram Post