{
  "cveId": "CVE-2021-41133",
  "url": "https://patchblox.com/security/cve/CVE-2021-41133",
  "summary": "CVE-2021-41133 is fixed in 8 products on 1 platform, first by flatpak 1.0.9-0ubuntu0.4, released October 8, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "flatpak: Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.\n\nSecurity Fix(es...",
  "description": "Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.\n\nSecurity Fix(es):\n\n* flatpak: Sandbox bypass via recent VFS-manipulating syscalls (CVE-2021-41133)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "published": "2021-10-08T07:15:00Z",
  "severity": "Important",
  "cvss": 8.8,
  "epss": 0.00436,
  "epssPercentile": 0.38172,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "flatpak",
      "release": "RHEL 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "RHSA-2021:4042",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.0.9-0ubuntu0.4",
      "fix": "flatpak 1.0.9-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-flatpak-1.0.9-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6.5-0ubuntu0.4",
      "fix": "flatpak 1.6.5-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-flatpak-1.6.5-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak",
      "release": "almalinux 8",
      "fixedVersion": "1.8.5-5.el8_5",
      "fix": "ALEA-2021:4539",
      "url": "https://patchblox.com/security/fix/linux/alea-2021-4539",
      "released": "2021-11-09T19:26:12Z"
    },
    {
      "platform": "linux",
      "product": "flatpak",
      "release": "ol 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "ELSA-2021-4042",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-devel",
      "release": "almalinux 8",
      "fixedVersion": "1.8.5-5.el8_5",
      "fix": "ALEA-2021:4539",
      "url": "https://patchblox.com/security/fix/linux/alea-2021-4539",
      "released": "2021-11-09T19:26:12Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-libs",
      "release": "RHEL 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "RHSA-2021:4042",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-libs",
      "release": "almalinux 8",
      "fixedVersion": "1.8.5-5.el8_5",
      "fix": "ALEA-2021:4539",
      "url": "https://patchblox.com/security/fix/linux/alea-2021-4539",
      "released": "2021-11-09T19:26:12Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-libs",
      "release": "ol 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "ELSA-2021-4042",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-selinux",
      "release": "RHEL 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "RHSA-2021:4042",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-selinux",
      "release": "almalinux 8",
      "fixedVersion": "1.8.5-5.el8_5",
      "fix": "ALEA-2021:4539",
      "url": "https://patchblox.com/security/fix/linux/alea-2021-4539",
      "released": "2021-11-09T19:26:12Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-selinux",
      "release": "ol 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "ELSA-2021-4042",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-session-helper",
      "release": "RHEL 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "RHSA-2021:4042",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-session-helper",
      "release": "almalinux 8",
      "fixedVersion": "1.8.5-5.el8_5",
      "fix": "ALEA-2021:4539",
      "url": "https://patchblox.com/security/fix/linux/alea-2021-4539",
      "released": "2021-11-09T19:26:12Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-session-helper",
      "release": "ol 8",
      "fixedVersion": "0:1.8.5-4.el8_4",
      "fix": "ELSA-2021-4042",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4042",
      "released": "2021-11-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-tests",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.0.9-0ubuntu0.4",
      "fix": "flatpak-tests 1.0.9-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-flatpak-tests-1.0.9-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "flatpak-tests",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6.5-0ubuntu0.4",
      "fix": "flatpak-tests 1.6.5-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-flatpak-tests-1.6.5-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-flatpak-1.0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.0.9-0ubuntu0.4",
      "fix": "gir1.2-flatpak-1.0 1.0.9-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-gir1.2-flatpak-1.0-1.0.9-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-flatpak-1.0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6.5-0ubuntu0.4",
      "fix": "gir1.2-flatpak-1.0 1.6.5-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-gir1.2-flatpak-1.0-1.6.5-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflatpak0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.0.9-0ubuntu0.4",
      "fix": "libflatpak0 1.0.9-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libflatpak0-1.0.9-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflatpak0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6.5-0ubuntu0.4",
      "fix": "libflatpak0 1.6.5-0ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libflatpak0-1.6.5-0ubuntu0.4",
      "released": "2021-10-08T07:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}