doc(k3s): GHSA-pwhc-rpq9-4c8w #25404
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The affected component's suffix is non-standard for parsing. It treats -k3s1 as an unknown qualifier that sorts after known ones (alpha, beta, rc, ga, etc.), which breaks version matching. The suffix is used in k3s because k3s pull in their own fork of containerd. In this case, all fixes associated with this vulnerability from upstream are also mirrored in the k3s containerd fork. See below for details: Fix commit in containerd from CVE advisory: containerd/containerd@7c59e8e Verifying the same 4 file changes appear in https://github.com/k3s-io/containerd/tree/v2.1.5: cmd/containerd/server/server.go https://github.com/k3s-io/containerd/blob/v2.1.5/cmd/containerd/server/server.go#L82-87 https://github.com/k3s-io/containerd/blob/v2.1.5/cmd/containerd/server/server.go#L109 core/runtime/v2/task_manager.go https://github.com/k3s-io/containerd/blob/v2.1.5/core/runtime/v2/task_manager.go#L78-79 plugins/cri/runtime/plugin.go https://github.com/k3s-io/containerd/blob/v2.1.5/plugins/cri/runtime/plugin.go#L82-88 plugins/sandbox/controller.go https://github.com/k3s-io/containerd/blob/v2.1.5/plugins/sandbox/controller.go#L71-75 Relates: wolfi-dev/os#72115
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dnegreira
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Nov 17, 2025
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The affected component's suffix is non-standard for parsing. It treats -k3s1
as an unknown qualifier that sorts after known ones (alpha, beta, rc, ga,
etc.), which breaks version matching.
The suffix is used in k3s because k3s pull in their own fork of containerd. In
this case, all fixes associated with this vulnerability from upstream are also
mirrored in the k3s containerd fork. See below for details:
Fix commit in containerd from CVE advisory: containerd/containerd@7c59e8e
Verifying the same 4 file changes appear in https://github.com/k3s-io/containerd/tree/v2.1.5:
cmd/containerd/server/server.go
https://github.com/k3s-io/containerd/blob/v2.1.5/cmd/containerd/server/server.go#L82-87
https://github.com/k3s-io/containerd/blob/v2.1.5/cmd/containerd/server/server.go#L109
core/runtime/v2/task_manager.go
https://github.com/k3s-io/containerd/blob/v2.1.5/core/runtime/v2/task_manager.go#L78-79
plugins/cri/runtime/plugin.go
https://github.com/k3s-io/containerd/blob/v2.1.5/plugins/cri/runtime/plugin.go#L82-88
plugins/sandbox/controller.go
https://github.com/k3s-io/containerd/blob/v2.1.5/plugins/sandbox/controller.go#L71-75
Relates: wolfi-dev/os#72115