kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests

It was found that paravirtpatchcall/jump functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests...

kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests

It was found that paravirtpatchcall/jump functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests...

UBUNTU-CVE-2018-15594

arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests...