CVE-2019-14821

CVE Details

Release Date:

2019-09-19

Description

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.

See more information about CVE-2019-14821 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	8.8	Base Metrics:	AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Access Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Changed	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel)	ELSA-2019-4256	2019-12-18
Oracle Linux version 6 (kernel-uek)	ELSA-2019-4800	2019-09-20
Oracle Linux version 6 (kernel-uek)	ELSA-2019-4808	2019-10-01
Oracle Linux version 7 (kernel)	ELSA-2019-3979	2019-11-26
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4799	2019-09-20
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4800	2019-09-20
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4808	2019-10-01
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4820	2019-10-11
Oracle Linux version 8 (kernel)	ELSA-2019-3517	2019-11-14
Oracle VM version 3.4 (kernel-uek)	OVMSA-2019-0044	2019-09-20
Oracle VM version 3.4 (kernel-uek)	OVMSA-2019-0046	2019-10-02

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team