CVE-2021-47112

01/תיאור (מקור, אנגלית)

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Teardown PV features on boot CPU as well Various PV features (Async PF, PV EOI, steal time) work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to make sure hypervisor doesn't write to stale locations after we jump to the previously hibernated kernel (which can try to place anything there). For secondary CPUs the job is already done by kvm_cpu_down_prepare(), register syscore ops to do the same for boot CPU.

02/מוצרים מושפעים

linux: linux kernel

03/קישורים8

• git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2 Patch
• git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54 Patch
• git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4 Patch
• git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6 Patch
• git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2 Patch
• git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54 Patch
• git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4 Patch
• git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6 Patch