{
  "cveId": "CVE-2021-3939",
  "url": "https://patchblox.com/security/cve/CVE-2021-3939",
  "summary": "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.",
  "title": "accountsservice: Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fa...",
  "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.",
  "published": "2021-11-16T10:00:00Z",
  "severity": "High",
  "epss": 0.0037,
  "epssPercentile": 0.31164,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "accountsservice",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.6.55-0ubuntu12~20.04.5",
      "fix": "accountsservice 0.6.55-0ubuntu12~20.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-accountsservice-0.6.55-0ubuntu12-20.04.5",
      "released": "2021-11-16T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "accountsservice",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.6.55-3ubuntu2",
      "fix": "accountsservice 0.6.55-3ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-accountsservice-0.6.55-3ubuntu2",
      "released": "2021-11-16T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-accountsservice-1.0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.6.55-0ubuntu12~20.04.5",
      "fix": "gir1.2-accountsservice-1.0 0.6.55-0ubuntu12~20.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-gir1.2-accountsservice-1.0-0.6.55-0ubuntu12-20.04.5",
      "released": "2021-11-16T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-accountsservice-1.0",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.6.55-3ubuntu2",
      "fix": "gir1.2-accountsservice-1.0 0.6.55-3ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-gir1.2-accountsservice-1.0-0.6.55-3ubuntu2",
      "released": "2021-11-16T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libaccountsservice0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.6.55-0ubuntu12~20.04.5",
      "fix": "libaccountsservice0 0.6.55-0ubuntu12~20.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libaccountsservice0-0.6.55-0ubuntu12-20.04.5",
      "released": "2021-11-16T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libaccountsservice0",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.6.55-3ubuntu2",
      "fix": "libaccountsservice0 0.6.55-3ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libaccountsservice0-0.6.55-3ubuntu2",
      "released": "2021-11-16T10:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}