A missing lock verification in AMD Secure Processor (ASP) firmware may permit a locally authenticated attacker with administrative privileges to alter MMIO routing on some Zen 5-based products, potentially compromising guest system integrity.
https://docs.cloud.google.com/support/bulletins/index#gcp-2026-019
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3034.html
Published: 2026-04-16
Updated: 2026-04-16
Base Score: 5.2
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:P/A:C
Severity: Medium
Base Score: 7.7
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: High
Base Score: 5.9
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
Severity: Medium