CVE-2021-44731
snapd could be made to escalate privileges and run programs as administrator
- Published
- Feb 17, 2022
- Updated
- Aug 4, 2024
- Assigning CNA
- canonical
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:HLow · next 30 days
- Percentile
- 59.2%
- 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
A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
Sources
1Local privilege escalation exploit for CVE-2021-44731 targeting snap-confine versions 2.54.2 and lower. Automatically detects vulnerable binaries and delivers a root shell via netcat.
Responsible use
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