CVE-2022-23648

Publication date 2 March 2022

Last updated 26 May 2025

Ubuntu priority

Cvss 3 Severity Score

containerd is a container runtime available as a daemon for Linux and Windows. A bug was found in containerd prior to versions 1.6.1, 1.5.10, and 1.14.12 where containers launched through containerd’s CRI implementation on Linux with a specially-crafted image configuration could gain access to read-only copies of arbitrary files and directories on the host. This may bypass any policy-based enforcement on container setup (including a Kubernetes Pod Security Policy) and expose potentially sensitive information. Kubernetes and crictl can both be configured to use containerd’s CRI implementation. This bug has been fixed in containerd 1.6.1, 1.5.10, and 1.4.12. Users should update to these versions to resolve the issue.

From the Ubuntu Security Team

It was discovered that containerd allows attackers to gain access to read-only copies of arbitrary files and directories on the host via a specially-crafted image configuration. An attacker could possibly use this issue to obtain sensitive information.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
containerd	22.04 LTS jammy	Fixed 1.5.9-0ubuntu2
	21.10 impish	Fixed 1.5.9-0ubuntu1~21.10.3
	20.04 LTS focal	Fixed 1.5.9-0ubuntu1~20.04.4
	18.04 LTS bionic	Fixed 1.5.5-0ubuntu3~18.04.2
	16.04 LTS xenial	Fixed 1.2.6-0ubuntu1~16.04.6+esm1 Ubuntu Pro

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Notes

mdeslaur

While this was fixed in USN-5311-1, a subsequent SRU regressed the security update.

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-5311-1
containerd vulnerability
3 March 2022

USN-5311-2
containerd regression
16 May 2022

USN-5521-1
containerd vulnerabilities
15 July 2022