Linux KVM Gets Patched For New AMD Cross-Thread Return Address Predictions Bug

[phoronix]

Phoronix: Linux KVM Gets Patched For New AMD Cross-Thread Return Address Predictions Bug

CVE-2022-27672 is being made public today as the "Cross-Thread Return Address Predictions" bug affecting various AMD and Hygon processors. This vulnerability affects the SMT mode where one sibling thread transitions out of the C0 state and the other sibling thread could use return target predictions...

https://www.phoronix.com/news/AMD-Thread-Return-Addr-Predict

[elbar]

UNIX sockets firmware support? And problem also is that under WSL(which supports systemd(but not default yet)) making kvm(or another needed soft) with UNIX sockets runable seem as a hell for Windows devs...

And making packagable installer with snap app under to deliver Linux app to Windows user maybe make Microsoft wonder WTF is happening and why their Windows updates are so nice made...

[muncrief]

Gosh darn it, I waited until the last rc as usual to test a new kernel, and just installed rc8 last night. My Windows 10 VM seemed to run fine, but I'm patching rc8 right now since this appears to be a potentially nasty bug.

Thanks for letting us know Michael. This is one of the many reasons I joined Phoronix, and try to peruse it everyday.

[muncrief]

I patched the Arch linux-mainline rc8 package and everything seems to be working fine. However I didn't notice any errors before the patch, so all I can confirm is that nothing is obviously broken.

[yurikoles]

However I didn't notice any errors before the patch, so all I can confirm is that nothing is obviously broken.

This is article is about a vulnerability.