UBUNTU-CVE-2021-26910

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Source
https://ubuntu.com/security/CVE-2021-26910
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-26910.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-26910
Related
Published
2021-02-08T20:15:00Z
Modified
2025-06-02T17:12:40Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.

References

Affected packages

Ubuntu:Pro:16.04:LTS / firejail

Package

Name
firejail
Purl
pkg:deb/ubuntu/firejail@0.9.38.10-0ubuntu0.16.04.1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.28-1
0.9.32-1
0.9.34-1
0.9.36-1
0.9.38-1
0.9.38-1ubuntu0.1
0.9.38.10-0ubuntu0.16.04.1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:Pro:18.04:LTS / firejail

Package

Name
firejail
Purl
pkg:deb/ubuntu/firejail@0.9.52-2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.50-3
0.9.52-1
0.9.52-2

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:20.04:LTS / firejail

Package

Name
firejail
Purl
pkg:deb/ubuntu/firejail@0.9.62-3ubuntu0.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.62-3ubuntu0.1

Affected versions

0.*

0.9.60-2
0.9.62-1
0.9.62-2
0.9.62-3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firejail",
            "binary_version": "0.9.62-3ubuntu0.1"
        },
        {
            "binary_name": "firejail-dbgsym",
            "binary_version": "0.9.62-3ubuntu0.1"
        },
        {
            "binary_name": "firejail-profiles",
            "binary_version": "0.9.62-3ubuntu0.1"
        }
    ],
    "ubuntu_priority": "medium"
}