CVE-2021-44730

HighCVSS 8.8/10Last modified Jun 17, 2026

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

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-59

Affected software

Vendor	Product	Versions
Canonical Ltd.	snapd	>= unspecified, <= 2.54.2

References

http://www.openwall.com/lists/oss-security/2022/02/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/23/1Mailing List, Third Party Advisory
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-5292-1Patch, Vendor Advisory
https://www.debian.org/security/2022/dsa-5080Issue Tracking, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/23/1Mailing List, Third Party Advisory
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-5292-1Patch, Vendor Advisory
https://www.debian.org/security/2022/dsa-5080Issue Tracking, Third Party Advisory

Timeline

Published: Feb 17, 2022
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

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