What’s Vulnerable › Vulnerabilities

CVE-2021-44730: snapd could be made to escalate privileges and run programs as administrator

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-17 · updated 2026-06-17
• Weakness: CWE-59

Description

snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

Affected products

• Canonical Ltd. snapd: through 2.54.2
• Canonical Ubuntu Linux: 18.04, 20.04, 21.10
• Debian Linux: 10.0, 11.0
• Fedoraproject Fedora: 34, 35

References

• http://www.openwall.com/lists/oss-security/2022/02/18/2
• http://www.openwall.com/lists/oss-security/2022/02/23/1
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
• https://ubuntu.com/security/notices/USN-5292-1
• https://www.debian.org/security/2022/dsa-5080
• http://www.openwall.com/lists/oss-security/2022/02/18/2
• http://www.openwall.com/lists/oss-security/2022/02/23/1
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
• https://ubuntu.com/security/notices/USN-5292-1
• https://www.debian.org/security/2022/dsa-5080

Get alerted when CVE-2021-44730 or the next vulnerability affects your stack