• AutoTL;DR@lemmings.worldB
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    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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