CVE-2019-14821

 

Published at: - 19-09-2019 08:15

Last modified: - 26-10-2022 02:02

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821
• [oss-security] 20190920 CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer-Mailing List, Patch, Third Party Advisory
• FEDORA-2019-15e141c6a7-Third Party Advisory
• DSA-4531-Third Party Advisory
• 20190925 [SECURITY] [DSA 4531-1] linux security update-Issue Tracking, Mailing List, Third Party Advisory
• [debian-lts-announce] 20190925 [SECURITY] [DLA 1930-1] linux security update-Mailing List, Third Party Advisory
• [debian-lts-announce] 20191001 [SECURITY] [DLA 1940-1] linux-4.9 security update-Mailing List, Third Party Advisory
• FEDORA-2019-a570a92d5a-Third Party Advisory
• https://security.netapp.com/advisory/ntap-20191004-0001/
• openSUSE-SU-2019:2307-Mailing List, Third Party Advisory
• openSUSE-SU-2019:2308-Mailing List, Third Party Advisory
• USN-4157-1-Third Party Advisory
• USN-4157-2-Third Party Advisory
• USN-4162-1-Third Party Advisory
• USN-4163-1-Third Party Advisory
• USN-4163-2-Third Party Advisory
• USN-4162-2-Third Party Advisory
• http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
• RHSA-2019:3517-Third Party Advisory
• RHSA-2019:3309-Third Party Advisory
• 20191108 [slackware-security] Slackware 14.2 kernel (SSA:2019-311-01)-Mailing List, Third Party Advisory
• http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
• RHSA-2019:3978-Third Party Advisory
• RHSA-2019:3979-Third Party Advisory
• RHSA-2019:4154-Third Party Advisory
• RHSA-2019:4256-Third Party Advisory
• RHSA-2020:0027-Third Party Advisory
• RHSA-2020:0204-Third Party Advisory
• N/A-Third Party Advisory

 

Keywords

NVD

 

CVE-2019-14821

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures