CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2021-3939
High (7.8) in canonical. EPSS 0.4% chance of exploitation in the next 30 days.
Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallback_locale variable, pointing to static storage, to be freed, in the user_change_language_authorized_cb function. This is reachable via the SetLanguage dbus function. This is fixed in versions 0.6.55-0ubuntu12~20.04.5, 0.6.55-0ubuntu13.3, 0.6.55-0ubuntu14.1.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-763, CWE-590
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:accountsservice
- canonical:ubuntu_linux
References
- http://packetstormsecurity.com/files/172848/Ubuntu-accountsservice-Double-Free-Memory-Corruption.html
- https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1950149
- https://ubuntu.com/security/notices/USN-5149-1
- http://packetstormsecurity.com/files/172848/Ubuntu-accountsservice-Double-Free-Memory-Corruption.html
- https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1950149