CVE-2021-3939

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CVSS 3.1

7.8 high

EPSS

<1%p28

Published

Nov 17, 2021 (Nov 17, 2021)

Modified

Jun 17, 2026

Description

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.

Vendors: canonical
Products: accountsservice, ubuntu linux
Weakness: CWE-590, CWE-763
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.3%)

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