Detections
Analytics
CVE-2017-7518
high
Description
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.
References
https://www.debian.org/security/2017/dsa-3981
https://usn.ubuntu.com/3754-1/
https://usn.ubuntu.com/3619-2/
https://usn.ubuntu.com/3619-1/
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518
https://access.redhat.com/errata/RHSA-2018:0412
https://access.redhat.com/errata/RHSA-2018:0395
https://access.redhat.com/articles/3290921
http://www.securitytracker.com/id/1038782