CVE-2019-20811: Medium severity Linux Linux kernel vulnerability

Published Mar 19, 2019
·
Updated

A flaw was found in the way the rxqueueaddkobject and netdevqueueaddkobject functions in the Linux kernel handled refcounting of certain objects. This flaw allows a local user who can trigger the error code path to use this vulnerability to disturb the integrity of the system.

Other sources

An issue was discovered in the Linux kernel before 5.0.6. In rxqueueaddkobject() and netdevqueueaddkobject() in net/core/net-sysfs.c, a reference count is mishandled, aka CID-a3e23f719f5c.

— Ubuntu

An issue was discovered in the Linux kernel. In rxqueueaddkobject() and netdevqueueaddkobject() in net/core/net-sysfs.c, a reference count is mishandled.

— Red Hat

Affected Software

9 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1160.6.1.rt56.1139.el7
0:3.10.0-1160.6.1.rt56.1139.el7
redhat/kernel<0:3.10.0-1160.6.1.el7
0:3.10.0-1160.6.1.el7
redhat/kernel<0:4.18.0-147.el8
0:4.18.0-147.el8
Linux Linux kernel<5.0.6
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.6.1.rt56.1139.el7
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.6.1.el7
  3. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-147.el8
  4. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  5. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.0.6

Event History

Mar 19, 2019
CVE Published
12:00 AM
Jun 3, 2020
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·02:44 AM
Data Sourced
via MITRE·02:44 AM
Description
Data Sourced
via NVD·03:15 AM
RemedyDescriptionSeverityAffected Software
Jun 11, 2020
Data Sourced
via Red Hat·03:22 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2019-20811?

CVE-2019-20811 has been classified as a medium-level severity vulnerability.

2

How do I fix CVE-2019-20811?

To fix CVE-2019-20811, update your kernel package to the specified remedial versions provided by your Linux distribution.

3

What systems are affected by CVE-2019-20811?

CVE-2019-20811 affects various Linux kernel versions including specific Red Hat, Debian, and Ubuntu distributions.

4

Can CVE-2019-20811 be exploited remotely?

CVE-2019-20811 is primarily a local vulnerability that requires a local user to exploit it.

5

Is CVE-2019-20811 a denial-of-service vulnerability?

CVE-2019-20811 can potentially disturb the integrity of the system but is not specifically categorized as a denial-of-service vulnerability.

Company

Resources

Contact

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