# CVE-2021-3939: accountsservice: Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fa...

CVE-2021-3939 is fixed in 3 products on 1 platform, first by accountsservice 0.6.55-0ubuntu12~20.04.5, released November 16, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-3939
- Priority: High
- CVSS: n/a (High)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 16, 2021

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | accountsservice Ubuntu 20.04 LTS (focal) | 0.6.55-0ubuntu12~20.04.5 | [accountsservice 0.6.55-0ubuntu12~20.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-accountsservice-0.6.55-0ubuntu12-20.04.5.md) | Nov 16, 2021 |
| Linux | accountsservice Ubuntu 22.04.1 LTS (jammy) | 0.6.55-3ubuntu2 | [accountsservice 0.6.55-3ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-accountsservice-0.6.55-3ubuntu2.md) | Nov 16, 2021 |
| Linux | gir1.2-accountsservice-1.0 Ubuntu 20.04 LTS (focal) | 0.6.55-0ubuntu12~20.04.5 | [gir1.2-accountsservice-1.0 0.6.55-0ubuntu12~20.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-accountsservice-1.0-0.6.55-0ubuntu12-20.04.5.md) | Nov 16, 2021 |
| Linux | gir1.2-accountsservice-1.0 Ubuntu 22.04.1 LTS (jammy) | 0.6.55-3ubuntu2 | [gir1.2-accountsservice-1.0 0.6.55-3ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gir1.2-accountsservice-1.0-0.6.55-3ubuntu2.md) | Nov 16, 2021 |
| Linux | libaccountsservice0 Ubuntu 20.04 LTS (focal) | 0.6.55-0ubuntu12~20.04.5 | [libaccountsservice0 0.6.55-0ubuntu12~20.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libaccountsservice0-0.6.55-0ubuntu12-20.04.5.md) | Nov 16, 2021 |
| Linux | libaccountsservice0 Ubuntu 22.04.1 LTS (jammy) | 0.6.55-3ubuntu2 | [libaccountsservice0 0.6.55-3ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libaccountsservice0-0.6.55-3ubuntu2.md) | Nov 16, 2021 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.