CVE-2020-11931

Name: CVE-2020-11931
Creator: NVD / NIST
Published: 2020-05-15T04:15:10.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2020-11931 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;

Metrics

CVSS 3.1

3.3/10

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

EPSS Probability

0.33%

24.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Pulseaudio	Pulseaudio	<= 1.8.0
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Canonical	Ubuntu Linux	20.04

References

https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3Third Party Advisory
https://usn.ubuntu.com/4355-1/Third Party Advisory
https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3Third Party Advisory
https://usn.ubuntu.com/4355-1/Third Party Advisory

Timeline

Published: May 15, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11931?

How severe is CVE-2020-11931?

CVE-2020-11931 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11931?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-11931?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST