Date: Tue, 25 Jul 2023 13:58:54 -0400 From: Demi Marie Obenour <demi@...isiblethingslab.com> To: oss-security@...ts.openwall.com Subject: Re: CVE-2023-20593: A use-after-free in AMD Zen2 Processors On Tue, Jul 25, 2023 at 06:12:44PM +0100, Eddie Chapman wrote: > alice wrote: > > this is a disaster of a security announcement from AMD. nothing is fixed > > except for epyc. the only workaround anyone really has is the chicken bit, > > thankfully. > > Yes, very disappointing. Pure speculation; perhaps they were planning on > disclosing at the end of the year with full set of Microcode ready but > something we don't know (yet) forced them to disclose early. Who knows. Does AMD make OS-loadable μcode patches available for client platforms, or must all μcode loading on clients be done by the firmware? If the latter, then it will take a very long time for clients to get patched, even if AMD released the updates promptly. Also, server platforms can usually reflash the firmware via the BMC, but client platforms do not have this option. -- Sincerely, Demi Marie Obenour (she/her/hers) Invisible Things Lab Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)
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