CVE-2018-1087

CVE Details

Release Date:	2018-07-30
Impact:	None	What is this?

Description

kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.

See more information about CVE-2018-1087 from MITRE CVE dictionary and NIST NVD

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

CVSS v2 metrics

Base Score:	4.6
Vector String:	AV:L/AC:L/Au:N/C:P/I:P/A:P
Version:	2.0
Attack Vector:	Local
Attack Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2018-4096	2018-05-08
Oracle Linux version 7 (kernel)	ELSA-2018-1318	2018-05-09
Oracle Linux version 7 (kernel-uek)	ELSA-2018-4096	2018-05-08
Oracle VM version 3.4 (kernel-uek)	OVMSA-2018-0040	2018-05-08