Cross-Process Information Leak

**Bulletin ID:**AMD-SB-7008 **Potential Impact:**Information disclosure **Severity:**Medium

Summary

Under specific microarchitectural circumstances, a register in “Zen 2” CPUs may not be written to 0 correctly. This may cause data from another process and/or thread to be stored in the YMM register, which may allow an attacker to potentially access sensitive information.

CVE Details

Refer to Glossary for explanation of terms

CVE	Severity	CVE Description
CVE-2023-20593	Medium	An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.

Mitigation

AMD recommends applying the µcode patch listed below for AMD EPYC™ 7002 Processors, and applying BIOS updates that include the following AGESA™ firmware versions for other affected products. AMD plans to release to the Original Equipment Manufacturers (OEM) the AGESA™ versions on the target dates listed below. Please refer to your OEM for the BIOS update specific to your product.

DATA CENTER

Mitigation details
Update to versions listed or higher|2nd Gen AMD EPYC™ Processors
(Formerly codenamed)
“Rome”
—|—

µcode****| 0x0830107B
(2023-06-06)

AGESA™ firmware****| RomePI 1.0.0.H
(2023-11-07)

DESKTOP

Mitigation details
Update to versions listed or higher|AMD Ryzen™ 3000 Series Desktop Processors
(Formerly codenamed)
“Matisse”|

AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics
(Formerly codenamed)
“Renoir” AM4
—|—|—

AGESA™ firmware ****|

ComboAM4v2PI
1.2.0.C
(2024-02-07)

ComboAM4PI
1.0.0.B
(2024-03-20)|

ComboAM4v2PI
1.2.0.Ca
(2024-03-14)

HIGH END DESKTOP (HEDT)

Mitigation details
Update to versions listed or higher|

AMD Ryzen™ Threadripper™ 3000 Series Processors
(Formerly codenamed)
“Castle Peak” HEDT
—|—

AGESA™ firmware| CastlePeakPI-SP3r3 1.0.0.A
(2023-11-21)

WORKSTATION

Mitigation details
Update to versions listed or higher|

AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors
(Formerly codenamed)
“Castle Peak” WS SP3
—|—

AGESA™ firmware****|

CastlePeakWSPI-sWRX8 1.0.0.C
(2023-11-29)

ChagallWSPI-sWRX8 1.0.0.7
(2024-01-11)

MOBILE - AMD Ryzen™ Series

Mitigation details
Update to versions listed or higher|

AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
(Formerly codenamed)
“Lucienne”|

AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics
(Formerly codenamed)
“Renoir”|AMD Ryzen™ 7020 Series Processors
(Formerly codenamed)
“Mendocino” FT6
—|—|—|—

AGESA™ firmware****| CezannePI-FP6
1.0.1.0
(2024-01-25)| RenoirPI-FP6
1.0.0.D
(2024-02-29)| MendocinoPI-FT6
1.0.0.6
(2024-01-03)

Embedded

Mitigation details
Update to versions listed or higher|

AMD EPYC™ Embedded 7002
—|—
AGESA™ firmware| EmbRomePI-SP3
1.0.0.B
(2023-12-15)

Embedded

Mitigation details
Update to versions listed or higher|

AMD Ryzen™ Embedded V2000
—|—
AGESA™ firmware| EmbeddedPI-FP6
1.0.0.9
(2024-04-15)