Is CVE-2019-14821 in the CISA KEV catalog?

No. CVE-2019-14821 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-14821?

CVE-2019-14821 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2019-14821?

CVE-2019-14821 has an EPSS score of 0.76% (51th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-14821?

Upgrade linux on debian 11 to 5.2.17-1 or later. Fixes are available for 73 affected products.

CVE & CISA-KEV Catalog

CVE-2019-14821

HIGH

8.8

CVSS v3

NVD

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.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

linuxDebian

Fixed in:5.2.17-1CVE-2019-14821

linuxUbuntu

Fixed in:4.4.0-166.195USN-4163-1

Fixed in:4.15.0-66.75USN-4162-1

linux-awsUbuntu

Fixed in:4.4.0-1056.60USN-4163-2

Fixed in:4.4.0-1096.107USN-4163-1

Fixed in:4.15.0-1052.54USN-4162-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1052.54~16.04.1USN-4162-1

linux-azureUbuntu

Fixed in:4.15.0-1061.66~14.04.1USN-4162-2

Fixed in:4.15.0-1061.66USN-4162-1

Fixed in:5.0.0-1023.24~18.04.1USN-4157-2

linux-gcpUbuntu

Fixed in:4.15.0-1047.50USN-4162-1

Fixed in:5.0.0-1021.21~18.04.1USN-4157-2

linux-gke-4.15Ubuntu

Fixed in:4.15.0-1046.49USN-4162-1

linux-gke-5.0Ubuntu

Fixed in:5.0.0-1023.23~18.04.2USN-4157-2

linux-hweUbuntu

Fixed in:4.15.0-66.75~16.04.1USN-4162-1

Fixed in:5.0.0-32.34~18.04.2USN-4157-2

linux-image-4.15.0-1027-oracleUbuntu

Fixed in:4.15.0-1027.30~16.04.1USN-4162-1

Fixed in:4.15.0-1027.30USN-4162-1

linux-image-4.15.0-1046-gkeUbuntu

Fixed in:4.15.0-1046.49USN-4162-1

linux-image-4.15.0-1047-gcpUbuntu

Fixed in:4.15.0-1047.50USN-4162-1

linux-image-4.15.0-1048-kvmUbuntu

Fixed in:4.15.0-1048.48USN-4162-1

linux-image-4.15.0-1049-raspi2Ubuntu

Fixed in:4.15.0-1049.53USN-4162-1

linux-image-4.15.0-1052-awsUbuntu

Fixed in:4.15.0-1052.54~16.04.1USN-4162-1

Fixed in:4.15.0-1052.54USN-4162-1

linux-image-4.15.0-1059-oemUbuntu

Fixed in:4.15.0-1059.68USN-4162-1

linux-image-4.15.0-1061-azureUbuntu

Fixed in:4.15.0-1061.66USN-4162-1

linux-image-4.15.0-1066-snapdragonUbuntu

Fixed in:4.15.0-1066.73USN-4162-1

linux-image-4.15.0-66-genericUbuntu

Fixed in:4.15.0-66.75~16.04.1USN-4162-1

Fixed in:4.15.0-66.75USN-4162-1

linux-image-4.15.0-66-generic-lpaeUbuntu

Fixed in:4.15.0-66.75~16.04.1USN-4162-1

Fixed in:4.15.0-66.75USN-4162-1

linux-image-4.15.0-66-lowlatencyUbuntu

Fixed in:4.15.0-66.75~16.04.1USN-4162-1

Fixed in:4.15.0-66.75USN-4162-1

linux-image-4.4.0-1060-kvmUbuntu

Fixed in:4.4.0-1060.67USN-4163-1

linux-image-4.4.0-1096-awsUbuntu

Fixed in:4.4.0-1096.107USN-4163-1

linux-image-4.4.0-1124-raspi2Ubuntu

Fixed in:4.4.0-1124.133USN-4163-1

linux-image-4.4.0-1128-snapdragonUbuntu

Fixed in:4.4.0-1128.136USN-4163-1

linux-image-4.4.0-166-genericUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-4.4.0-166-generic-lpaeUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-4.4.0-166-lowlatencyUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-4.4.0-166-powerpc-e500mcUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-4.4.0-166-powerpc-smpUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-4.4.0-166-powerpc64-embUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-4.4.0-166-powerpc64-smpUbuntu

Fixed in:4.4.0-166.195USN-4163-1

linux-image-5.0.0-1021-gcpUbuntu

Fixed in:5.0.0-1021.21~18.04.1USN-4157-2

linux-image-5.0.0-1023-azureUbuntu

Fixed in:5.0.0-1023.24~18.04.1USN-4157-2

linux-image-5.0.0-1023-gkeUbuntu

Fixed in:5.0.0-1023.23~18.04.2USN-4157-2

linux-image-5.0.0-32-genericUbuntu

Fixed in:5.0.0-32.34~18.04.2USN-4157-2

linux-image-5.0.0-32-generic-lpaeUbuntu

Fixed in:5.0.0-32.34~18.04.2USN-4157-2

linux-image-5.0.0-32-lowlatencyUbuntu

Fixed in:5.0.0-32.34~18.04.2USN-4157-2

linux-image-awsUbuntu

Fixed in:4.4.0.1096.100USN-4163-1

Fixed in:4.15.0.1052.51USN-4162-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1052.52USN-4162-1

linux-image-azureUbuntu

Fixed in:4.15.0.1061.64USN-4162-1

Fixed in:5.0.0.1023.33USN-4157-2

linux-image-gcpUbuntu

Fixed in:4.15.0.1047.61USN-4162-1

Fixed in:5.0.0.1021.26USN-4157-2

linux-image-genericUbuntu

Fixed in:4.4.0.166.174USN-4163-1

Fixed in:4.15.0.66.68USN-4162-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.66.86USN-4162-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.0.0.32.89USN-4157-2

linux-image-generic-lpaeUbuntu

Fixed in:4.4.0.166.174USN-4163-1

Fixed in:4.15.0.66.68USN-4162-1

linux-image-generic-lpae-hwe-16.04Ubuntu

Fixed in:4.15.0.66.86USN-4162-1

linux-image-generic-lpae-hwe-18.04Ubuntu

Fixed in:5.0.0.32.89USN-4157-2

linux-image-gkeUbuntu

Fixed in:4.15.0.1047.61USN-4162-1

Fixed in:4.15.0.1046.49USN-4162-1

linux-image-gke-4.15Ubuntu

Fixed in:4.15.0.1046.49USN-4162-1

linux-image-gke-5.0Ubuntu

Fixed in:5.0.0.1023.12USN-4157-2

linux-image-kvmUbuntu

Fixed in:4.4.0.1060.60USN-4163-1

Fixed in:4.15.0.1048.48USN-4162-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.166.174USN-4163-1

Fixed in:4.15.0.66.68USN-4162-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.66.86USN-4162-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.0.0.32.89USN-4157-2

linux-image-oemUbuntu

Fixed in:4.15.0.66.86USN-4162-1

Fixed in:4.15.0.1059.63USN-4162-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1027.20USN-4162-1

Fixed in:4.15.0.1027.30USN-4162-1

linux-image-powerpc-e500mcUbuntu

Fixed in:4.4.0.166.174USN-4163-1

linux-image-powerpc-smpUbuntu

Fixed in:4.4.0.166.174USN-4163-1

linux-image-powerpc64-embUbuntu

Fixed in:4.4.0.166.174USN-4163-1

linux-image-powerpc64-smpUbuntu

Fixed in:4.4.0.166.174USN-4163-1

linux-image-raspi2Ubuntu

Fixed in:4.4.0.1124.124USN-4163-1

Fixed in:4.15.0.1049.47USN-4162-1

linux-image-snapdragonUbuntu

Fixed in:4.4.0.1128.120USN-4163-1

Fixed in:4.15.0.1066.69USN-4162-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.0.0.32.89USN-4157-2

linux-image-virtualUbuntu

Fixed in:4.4.0.166.174USN-4163-1

Fixed in:4.15.0.66.68USN-4162-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.66.86USN-4162-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.0.0.32.89USN-4157-2

linux-kvmUbuntu

Fixed in:4.4.0-1060.67USN-4163-1

Fixed in:4.15.0-1048.48USN-4162-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-166.195~14.04.1USN-4163-2

linux-oemUbuntu

Fixed in:4.15.0-1059.68USN-4162-1

linux-oracleUbuntu

Fixed in:4.15.0-1027.30~16.04.1USN-4162-1

Fixed in:4.15.0-1027.30USN-4162-1

linux-raspi2Ubuntu

Fixed in:4.4.0-1124.133USN-4163-1

Fixed in:4.15.0-1049.53USN-4162-1

linux-snapdragonUbuntu

Fixed in:4.4.0-1128.136USN-4163-1

Fixed in:4.15.0-1066.73USN-4162-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.76%probability of exploitation in 30 days

51stpercentile

Moderate risk: more likely to be exploited than 51% of all known CVEs.

References

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.