Tavis Ormandy discovered that under specific microarchitectural circumstances, a vector register in AMD Zen 2 CPUs may not be written to 0 correctly. This flaw allows an attacker to leak sensitive information across concurrent processes, hyper threads and virtualized guests. For details please refer to and . This issue can also be mitigated by a microcode update through the amd64-microcode package or a system firmware (BIOS/UEFI) update. However, the initial microcode release by AMD only provides updates for second generation EPYC CPUs. Various Ryzen CPUs are also affected, but no updates are available yet. For the stable distribution (bookworm), this problem has been fixed in version 6.1.38-2. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux
Tavis Ormandy discovered that under specific microarchitectural
circumstances, a vector register in AMD Zen 2
CPUs may not be
written to 0 correctly. This flaw allows an attacker to leak
sensitive information across concurrent processes, hyper threads
and virtualized guests.
For details please refer to
This issue can also be mitigated by a microcode update through the amd64-microcode package or a system firmware (BIOS/UEFI) update. However, the initial microcode release by AMD only provides updates for second generation EPYC CPUs. Various Ryzen CPUs are also affected, but no updates are available yet.
For the stable distribution (bookworm), this problem has been fixed in version 6.1.38-2.
We recommend that you upgrade your linux packages.
For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux
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