CVE-2020-11931 json
Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded
published 2020-05-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4268
- cvss
- 3.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
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;
Patch / fix
- Canonical pulseaudio 1:8.0-0ubuntu3.12, 1:11.1-1ubuntu7.7, 1:13.0-1ubuntu1.2, 1:13.99.1-1ubuntu3.2
- pulseaudio Ubuntu 16.04 LTS 1:8.0-0ubuntu3.12
- pulseaudio Ubuntu 18.04 LTS 1:11.1-1ubuntu7.7
- pulseaudio Ubuntu 20.04 LTS 1:13.99.1-1ubuntu3.2
ubuntu advisories UBUNTU-CVE-2020-11931
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Canonical pulseaudio
Classification
References
-
usn.ubuntu.com
/4355-1/
vendor-advisory, third-party-advisory
-
forum.snapcraft.io
/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3
third-party-advisory
Sources
- CVE List CVE-2020-11931
- NVD CVE-2020-11931
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.