If there is a performance cost for this, hopefully it isn’t too high given the limited resources of the Deck.
Linux Kernel Updated To Add Zenbleed Fix For Valve's Steam Deck
Submitted 1 year ago by artichoke@lemmy.world to steamdeck@sopuli.xyz
https://www.phoronix.com/news/Linux-Zenbleed-Steam-Deck
Comments
vividspecter@lemm.ee 1 year ago
Tag365@lemmy.zip 1 year ago
What is Zenbleed?
unscholarly_source@lemmy.ca 1 year ago
It’s a vulnerability that affects AMD CPUs that can potentially lead to unintentional/malicious data leak.
autotldr@lemmings.world [bot] 1 year ago
This is the best summary I could come up with:
Last month when the Linux kernel was mitigated for Zenbleed as a CPU vulnerability affecting AMD Zen 2 processors, it turns out the Steam Deck APU was accidentally left without coverage.
An x86/urgent pull request sent out today for the Linux 6.5 kernel and for back-porting to current stable Linux kernel releases will extend the Zenbleed mitigation to protect Steam Deck gamers.
Most notable with these fixes is adding models 0x90-0x91 to the range of AMD Zenbleed-affected Zen 2 processors.
It looks like the Steam Deck’s custom APU was just accidentally left out in the original Zenbleed patch.
This patch enables the Zenbleed fallback fix until a proper CPU microcode update is available for the Steam Deck.
Zenbleed (CVE-2023-20593) was disclosed last month after this data leakage vulnerability was discovered by a Google researcher.
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