Mastodawn

🌕 AMD 悄然移除消費級 Ryzen CPU 記憶體加密功能，用戶恐面臨資安隱憂
➤ 韌體更新背後的「資安真空」：當硬體功能被無預警撤除
✤ https://www.tomshardware.com/pc-components/cpus/amd-silently-removes-memory-encryption-from-consumer-ryzen-cpus-leaving-users-unaware-that-they-may-be-vulnerable-security-feature-vanishes-after-newer-agesa-firmware-amd-engineers-go-radio-silent-when-pressed-about-the-change
近期報導指出，AMD 在更新其 AGESA 韌體後，悄然移除了消費級 Ryzen 處理器的記憶體加密功能。這一變動並未經過公開說明，導致許多用戶在不知情的情況下，可能暴露於潛在的安全風險中。當媒體針對此舉向 AMD 工程師進行詢問時，
#硬體資安 #AMD Ryzen #AGESA 韌體 #處理器架構

AMD silently removes memory encryption from consumer Ryzen CPUs, leaving users unaware that they may be vulnerable — security feature vanishes after newer AGESA firmware, AMD engineers go radio silent when pressed about the change

AMD engineer shuts down discussions on the issue

Tom's Hardware

Denzil Ferreira Jun 18

https://www.techspot.com/news/112791-amd-quietly-disabled-ram-encryption-consumer-ryzen-cpus.html

You may want to hold off updating AM5 motherboard BIOS. Not clear yet if it's brand specific.

#security #bios #am5 #amd #agesa

AMD quietly disabled RAM encryption on some consumer Ryzen CPUs and users want to know why

The change came to light in April, when Ben Kilpatrick installed a new OS on a Ryzen 7 9700X system built on AMD's Zen 5 architecture. He...

TechSpot

WinFuture.de Jun 17

Offenbar hat #AMD mit #AGESA 1.2.7.0 klammheimlich die Speicherverschlüsselung #TSME auf regulären #Ryzen-#CPUs deaktiviert. Die Funktion bleibt nun den teureren Pro-Modellen vorbehalten. https://winfuture.de/news,159404.html?utm_source=Mastodon&utm_medium=ManualStatus&utm_campaign=SocialMedia

Ryzen-Update: AMD streicht Hardware-Schutz für RAM ohne Vorwarnung

Ein AGESA-Firmware-Update sorgt bei Besitzern von Ryzen-CPUs für Unmut. Eine Sicherheitsfunktion, die den Arbeitsspeicher vor physischen Angriffen schützt, wurde auf regulären Consumer-Prozessoren ohne Vorwarnung deaktiviert. AMD schweigt.

WinFuture.de

Shawn Brink Jun 13, 2025

#MSI Releases #AMD #AGESA Combo PI-1.2.0.3e #BIOS, Supporting all 64GBx4 DRAM Chips and New CPU
https://www.elevenforum.com/t/msi-releases-amd-agesa-combo-pi-1-2-0-3e-bios-supporting-all-64gbx4-dram-chips-and-new-cpu.37004/

WinFuture.de Apr 24, 2025

Mit einem #AGESA-Update schließt #AMD endlich die kritische #Sicherheitslücke "#EntrySign", die alle Zen-#Prozessoren plagt. Erste Mainboardhersteller haben bereits ein #BIOS-#Update für Nutzer veröffentlicht. https://winfuture.de/news,150530.html?utm_source=Mastodon&utm_medium=ManualStatus&utm_campaign=SocialMedia

AMD: Wichtiges BIOS-Update schließt kritische Sicherheitslücke in CPUs

Mit einem neuen AGESA-Update wird eine kritische Sicherheitslücke in allen Zen-Prozessoren geschlossen. Mainboardhersteller bieten bereits Updates zum Download an. Die beseitigte Schwachstelle "EntrySign" erlaubt das Umgehen der Mikrocode-Signaturprüfung.

WinFuture.de

Harry Sintonen Jan 10, 2025

Modern motherboard firmwares (#BIOS for us oldtimers) are outright awful. Toggling a single option X on/off isn't necessarily binary. Enabling option X might enable other option Y (and maybe more) which will remain enabled even if you disable X again.

This makes it extremely difficult to do binary search on situations where some firmware option causes you trouble.

I was bit by this earlier today when I enabled AMD Precision Boost Overdrive on an AM4 system. The system would start to fail compile tasks randomly (and #Prime95 within second) when PBO was enabled. Confusingly disabling PBO did not result in a working system, but the system kept crashing. I updated the firmware to the latest version and the system became stable again. "Great, #AGESA update must've fixed the stability issue!", I naively thought. So I enabled PBO, system kept crashing, I disabled PBO, system kept crashing. Frustration ensued.

"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth". Enabling PBO pulls some other options which cause the stability issue, and disabling PBO doesn't disable them.

Sure enough, resetting BIOS to default, then enabling everything but PBO resulted in a stable system that is able to run Prime95 for hours. While it might be possible to figure out what this "extra" option causing the instability actually is, at this stage I was happy to just have a working system. It won't touch PBO on this box ever again.

#Hardware #AMD #PBO #troubleshooting

CEOTECH.IT Sep 25, 2024

AMD Ryzen 9000: prestazioni al top con il nuovo BIOS
#AGESA #Aggiornamenti #AMDRyzen9000 #Benchmark #BIOS #CPU #Gaming #Linux #Notizie #Novità #Overclock #PC #Prestazioni #Processori #Produttività #TDP #Tecnologia #Windows11

https://www.ceotech.it/amd-ryzen-9000-prestazioni-al-top-con-il-nuovo-bios/

AMD Ryzen 9000: prestazioni al top con il nuovo BIOS

AMD ha rilasciato un nuovo BIOS che potenzia le prestazioni dei processori Ryzen 9000 fino al 13%. Migliora l'esperienza di gioco e produttività.Gli utenti

CeoTech

christopher 🔜 EMF Sep 14, 2024

fyi #ASUS #AM4 #AM5 motherboard owners, the new BIOS just dropped

1. Updated to AMD #AGESA PI 1.2.0.1a.
2. Resolved the #SMM Lock Bypass and Sinkhole security vulnerabilities.
3. The control limit mode (cTDP to105W) was moved to a more accessible location for different processors.

(ROG STRIX B650E-I GAMING WIFI link)

https://rog.asus.com/us/motherboards/rog-strix/rog-strix-b650e-i-gaming-wifi-model/helpdesk_bios/

ROG STRIX B650E-I GAMING WIFI | Motherboards | ROG United States

The ROG Strix B650-I Gaming WiFi combos with AMD Ryzen 7000 Series processors for huge performance in tiny builds. Featuring PCIe 5.0®, DDR5, WiFi 6E, and USB 3.2 Gen 2x2, it packs a ton in its mini-ITX frame. Its specs are supported by ASUS-exclusive technologies like PBO Enhancement, AI Cooling II, and Two-Way Noise Cancelation to simplify configuration and tuning.

@ROG