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.Referenceshttps://usn.ubuntu.com/3776-1/https://twitter.com/grsecurity/status/1029324426142199808https://usn.ubuntu.com/3776-2/https://usn.ubuntu.com/3777-1/https://usn.ubuntu.com/3775-1/https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlhttps://github.com/torvalds/linux/commit/5800dc5c19f34e6e03b5adab1282535cb102fafdhttps://www.debian.org/security/2018/dsa-4308https://usn.ubuntu.com/3775-2/http://www.securityfocus.com/bid/105120https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1http://www.securitytracker.com/id/1041601https://usn.ubuntu.com/3777-2/http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5800dc5c19f34e6e03b5adab1282535cb102fafdhttps://usn.ubuntu.com/3777-3/http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.htmlhttps://access.redhat.com/errata/RHSA-2019:2043https://access.redhat.com/errata/RHSA-2019:2029
