CVE-2017-7518

CVE Details

Release Date:	2018-07-30
Impact:	Moderate	What is this?

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.

See more information about CVE-2017-7518 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.8
Vector String:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2018-4062	2018-04-10
Oracle Linux version 7 (kernel)	ELSA-2018-0395	2018-03-07
Oracle Linux version 7 (kernel-uek)	ELSA-2018-4062	2018-04-10
Oracle VM version 3.4 (kernel-uek)	OVMSA-2018-0033	2018-04-11