Bug 2549886 (CVE-2026-95837)

Summary: CVE-2026-95837 github.com/containerd/containerd: containerd: Privilege escalation via crafted container checkpoint restore
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in containerd. This flaw allows privilege escalation when creating a container from a saved checkpoint because process security settings are restored directly from checkpoint data rather than enforcing the destination security policy. An attacker with permissions to create containers can exploit this vulnerability by supplying a crafted checkpoint to execute processes with elevated root privileges and bypass security controls. Additionally, container status reporting reflects the requested configuration rather than the actual state, concealing the elevated privileges.
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Description OSIDB Bzimport 2026-10-12 19:51:28 UTC 
containerd is an open-source container runtime. From 2.1.0 until 2.2.7 and 2.3.4, containerd's CRI CreateContainer checkpoint restore is vulnerable because CRIU restores process security state from checkpoint data instead of enforcing the destination ContainerConfig. An attacker who can create a container from a crafted checkpoint can supply restored credentials, capabilities, no_new_privs, and seccomp state. The restored process can run as root with full capabilities and no enforced seccomp filters while CRI status reports the requested configuration. Systems that do not use CRI checkpoint restore are not affected. This issue is fixed in versions 2.2.7 and 2.3.4.