VULNERABILITY INTELLIGENCE

CVE-2017-7518

CVSS score5.5 MEDIUM
EPSS probability0.67%
CISA KEVNot currently listed
Published2018-07-30
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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.

Weakness classification

  • CWE-250: Execution with Unnecessary Privileges
  • CWE-755: Improper Handling of Exceptional Conditions

Primary references