CVE-2017-7518CWE-250

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…

Medium · published July 30, 2018

CVSS v3.0
5.5
EPSS
1%
Percentile
51.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
5.5 · MEDIUM
Vector
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00672 · 51.5th percentile
Weakness
CWE-250 · Execution with Unnecessary Privileges
Published
2018-07-30T13:00Z
EPSS history
Timeline
  • 30 JUL 13:00Z
    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…
    cvelistv5