CVE-2020-16126
accountsservice drops ruid, allows unprivileged users to send it signals
- Published
- Nov 11, 2020
- Updated
- Sep 16, 2024
- Assigning CNA
- canonical
- Evidence observed
- Aug 5, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LLow · next 30 days
- Percentile
- 44.2%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, improperly dropped the ruid, allowing untrusted users to send signals to AccountService, thus stopping it from handling D-Bus messages in a timely fashion.
Sources
1A bash script exploit of [CVE-2020-16126/CVE-2020-16127] to achieve privilege escalation. Ubuntu 16.04-20.04 LTS local privilege escalation exploit script. Requires Gnome graphical environment.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.