What’s Vulnerable › Vulnerabilities

CVE-2020-11931: Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-15 · updated 2026-06-17
• Weakness: CWE-284

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;

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.10, 20.04
• Canonical Ltd. Ubuntu's pulseaudio: through 1.8.0

References

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

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