CVE-2026-53489

Description

containerd is an open-source container runtime. Versions prior to 2.3.2, 2.2.5 and 2.1.9 contain a bug where the CRI plugin restores container.log from a checkpoint image without validating a symlinked path. This could result in reading an arbitrary file on the host via kubectl logs. This issue has been fixed in versions 2.3.2, 2.2.5 and 2.1.9.

Read the notes from the security team

Why is this CVE high priority?

High severity

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
containerd	26.04 LTS resolute	Not affected
	25.10 questing	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
containerd-app	26.04 LTS resolute	Fixed 2.2.2-0ubuntu1.1
	25.10 questing	Fixed 2.2.1-0ubuntu1~25.10.2
	24.04 LTS noble	Fixed 2.2.1-0ubuntu1~24.04.3
	22.04 LTS jammy	Fixed 2.2.1-0ubuntu1~22.04.2
	20.04 LTS focal	Not affected
containerd-stable	26.04 LTS resolute	Fixed 2.2.2-0ubuntu1.1
	25.10 questing	Fixed 2.1.6-0ubuntu1~25.10.2
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release

Notes

alexmurray

Traditionally the containerd source package contained both the library and docker application. However, in releases that contain the containerd-app source package, the containerd source package contains only the library whilst the docker application itself is contained in the containerd-app package.

mdeslaur

containerd-app gets new upstream versions, containerd-stable gets backported security updates and minor point updates

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
containerd-app	Upstream: 3576522
containerd-stable	Upstream: 570e698 Upstream: 3576522

Severity score breakdown

CVSS version:

Base score 8.2 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Attack requirements	None
Privileges required	None
User interaction	None
Vulnerable system - Confidentiality impact	High
Vulnerable system - Integrity impact	None
Vulnerable system - Availability impact	None
Subsequent system - Confidentiality impact	High
Subsequent system - Integrity impact	None
Subsequent system - Availability impact	None

Scores

Parameter	Value
Base score	8.2 · High
Base + Threat score	-
Base + Environmental score	-
Base + Threat + Environmental score	-

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Base score 6.5 · Medium