{"id":"CVE-2020-15257","aliases":["ALPINE-CVE-2020-15257","BELL-CVE-2020-15257","DEBIAN-CVE-2020-15257","DSA-4865-1","EUVD-2021-0915","GHSA-36xw-fx78-c5r4","GO-2022-0784","SUSE-SU-2020:3938-1","SUSE-SU-2021:0435-1","SUSE-SU-2025:03540-1","SUSE-SU-2025:03545-1","UBUNTU-CVE-2020-15257","USN-4653-1","USN-4653-2","openSUSE-SU-2021:0278-1","openSUSE-SU-2024:10693-1","openSUSE-SU-2024:10722-1","openSUSE-SU-2025:15589-1"],"status":"published","title":"containerd-shim API Exposed to Host Network Containers","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","severity":{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.03125,"percentile":0.88022,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-669"],"published":"2020-11-30T00:00:00Z","modified":"2026-11-03T06:32:36Z","exploits":[{"source":"pocgithub","id":"nccgroup/abstractshimmer","title":"nccgroup/abstractshimmer","date":"2020-12-07","url":"https://github.com/nccgroup/abstractshimmer"}],"fixes":[{"ecosystem":"Go","package":"github.com/containerd/containerd","fixed_in":["1.3.9","1.4.3"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.11","package":"containerd","fixed_in":["1.3.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"containerd","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"docker","fixed_in":["19.03.14-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"k3s","fixed_in":["1.19.4.2-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"containerd","fixed_in":["1.4.3~ds1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"containerd","fixed_in":["1.4.3~ds1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"containerd","fixed_in":["1.4.3~ds1-1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"docker.io","fixed_in":["20.10.0~rc1+dfsg2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"docker.io","fixed_in":["20.10.0~rc1+dfsg2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"docker.io","fixed_in":["20.10.0~rc1+dfsg2-1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux 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API Exposed to Host Network Containers","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-12-01T02:30:16Z","modified":"2024-08-04T13:15:19.03Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-669"],"updated_at":"2026-11-02T14:35:50.228781Z"}],"euvd":[{"id":"EUVD-2021-0915","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-12-01T02:30:16Z","modified":"2024-08-04T13:15:19Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T03:07:31.955969Z"}],"ghsa":[{"id":"GHSA-36xw-fx78-c5r4","title":"containerd-shim API Exposed to Host Network Containers","description":"## Impact\n\nAccess controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges.\n\n### Specific Go Packages Affected\ngithub.com/containerd/containerd/cmd\n\n## Patches\n\nThis vulnerability has been fixed in containerd 1.3.9 and 1.4.3.  Users should update to these versions as soon as they are released.  It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade.\n\n## Workarounds\n\nIf you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with `docker run --net=host` or `hostNetwork: true` in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue.\n\nIf you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to `deny unix addr=@**,` to your policy.\n\nIt is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces.  The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.\n\n## Credits\n\nThe containerd maintainers would like to thank Jeff Dileo of NCC Group for responsibly disclosing this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/master/SECURITY.md) and for reviewing the patch.\n\n## For more information\n\nIf you have any questions or comments about this advisory:\n\n\n* [Open an issue](https://github.com/containerd/containerd/issues/new/choose)\n* Email us at security@containerd.io if you think you’ve found a security bug.","status":"published","published":"2021-05-24T17:00:22Z","modified":"2023-10-02T15:37:36Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-669"],"updated_at":"2026-11-02T14:37:07.641671Z"}],"nvd":[{"id":"CVE-2020-15257","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-12-01T03:15:11.257Z","modified":"2026-06-17T02:56:22.47Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-669"],"updated_at":"2026-11-02T14:06:25.394006Z"}],"osv":[{"id":"ALPINE-CVE-2020-15257","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-12-01T03:15:11.257Z","modified":"2026-11-03T06:32:36.347637442Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:20.312441Z"},{"id":"BELL-CVE-2020-15257","title":"CVE-2020-15257 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:14:55.710362Z","modified":"2026-01-26T09:49:18.308657Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2020-15257","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-12-01T03:15:11.257Z","modified":"2026-10-20T10:51:56.542170319Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:14.828228Z"},{"id":"DEBIAN-CVE-2020-15257","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-12-01T03:15:11.257Z","modified":"2026-10-26T12:01:30.25267085Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"GHSA-36xw-fx78-c5r4","title":"containerd-shim API Exposed to Host Network Containers","description":"## Impact\n\nAccess controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges.\n\n### Specific Go Packages Affected\ngithub.com/containerd/containerd/cmd\n\n## Patches\n\nThis vulnerability has been fixed in containerd 1.3.9 and 1.4.3.  Users should update to these versions as soon as they are released.  It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade.\n\n## Workarounds\n\nIf you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with `docker run --net=host` or `hostNetwork: true` in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue.\n\nIf you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to `deny unix addr=@**,` to your policy.\n\nIt is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces.  The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.\n\n## Credits\n\nThe containerd maintainers would like to thank Jeff Dileo of NCC Group for responsibly disclosing this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/master/SECURITY.md) and for reviewing the patch.\n\n## For more information\n\nIf you have any questions or comments about this advisory:\n\n\n* [Open an issue](https://github.com/containerd/containerd/issues/new/choose)\n* Email us at security@containerd.io if you think you’ve found a security bug.","status":"published","published":"2021-05-24T17:00:22Z","modified":"2026-09-10T03:49:04.046246275Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-669"],"updated_at":"2026-11-02T15:46:35.406455Z"},{"id":"UBUNTU-CVE-2020-15257","description":"containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the \"host\" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.","status":"published","published":"2020-11-30T00:00:00Z","modified":"2026-02-04T02:25:38.983653Z","cvss":[{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"},{"version":"3.1","score":5.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:23.344108Z"},{"id":"DSA-4865-1","title":"docker.io - security update","status":"published","published":"2021-02-27T00:00:00Z","modified":"2026-03-09T02:10:02.694944Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"GO-2022-0784","title":"containerd-shim API Exposed to Host Network Containers in github.com/containerd/containerd","description":"containerd-shim API Exposed to Host Network Containers in github.com/containerd/containerd","status":"published","published":"2024-08-21T15:28:59Z","modified":"2026-02-04T02:49:36.891619Z","updated_at":"2026-11-02T15:47:00.918515Z"},{"id":"openSUSE-SU-2021:0278-1","title":"Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork","description":"This update for containerd, docker, docker-runc, golang-github-docker-libnetwork fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-15257: Fixed a privilege escalation in containerd (bsc#1178969).\n- CVE-2021-21284: potential privilege escalation when the root user in the remapped namespace has access to the host filesystem (bsc#1181732)\n- CVE-2021-21285: pulling a malformed Docker image manifest crashes the dockerd daemon (bsc#1181730)\n\nNon-security issues fixed:\n\n- Update Docker to 19.03.15-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. This update includes fixes for\n  bsc#1181732 (CVE-2021-21284) and bsc#1181730 (CVE-2021-21285).\n\n- Only apply the boo#1178801 libnetwork patch to handle firewalld on openSUSE.\n  It appears that SLES doesn't like the patch. (bsc#1180401)\n\n- Update to containerd v1.3.9, which is needed for Docker v19.03.14-ce and\n  fixes CVE-2020-15257. bsc#1180243\n\n- Update to containerd v1.3.7, which is required for Docker 19.03.13-ce.\n  bsc#1176708\n\n- Update to Docker 19.03.14-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. CVE-2020-15257 bsc#1180243\n  https://github.com/docker/docker-ce/releases/tag/v19.03.14\n\n- Enable fish-completion\n\n- Add a patch which makes Docker compatible with firewalld with\n  nftables backend. Backport of https://github.com/moby/libnetwork/pull/2548\n  (bsc#1178801, SLE-16460)\n\n- Update to Docker 19.03.13-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. bsc#1176708\n\n- Fixes for %_libexecdir changing to /usr/libexec (bsc#1174075)\n\n- Emergency fix: %requires_eq does not work with provide symbols,\n  only effective package names. Convert back to regular Requires.\n\n- Update to Docker 19.03.12-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md.\n- Use Go 1.13 instead of Go 1.14 because Go 1.14 can cause all sorts of\n  spurrious errors due to Go returning -EINTR from I/O syscalls much more often\n  (due to Go 1.14's pre-emptive goroutine support).\n- Add BuildRequires for all -git dependencies so that we catch missing\n  dependencies much more quickly.\n\n- Update to libnetwork 55e924b8a842, which is required for Docker 19.03.14-ce.\n  bsc#1180243\n\n- Add patch which makes libnetwork compatible with firewalld with\n  nftables backend. Backport of https://github.com/moby/libnetwork/pull/2548\n  (bsc#1178801, SLE-16460)\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2021-02-12T00:12:41Z","modified":"2026-02-04T02:37:51.08362Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:10693-1","title":"containerd-1.4.8-2.2 on GA media","description":"These are all security issues fixed in the containerd-1.4.8-2.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:33:56.633182Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"openSUSE-SU-2024:10722-1","title":"docker-20.10.6_ce-2.1 on GA media","description":"These are all security issues fixed in the docker-20.10.6_ce-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:33:31.003813Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"openSUSE-SU-2025:15589-1","title":"docker-stable-24.0.9_ce-15.1 on GA media","description":"These are all security issues fixed in the docker-stable-24.0.9_ce-15.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-09-30T00:00:00Z","modified":"2026-03-23T04:53:58.562077Z","updated_at":"2026-11-02T16:58:37.810934Z"},{"id":"SUSE-SU-2020:3938-1","title":"Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork","description":"This update for containerd, docker, docker-runc, golang-github-docker-libnetwork fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-15257: Fixed a privilege escalation in containerd (bsc#1178969).\n\nNon-security issues fixed:\n\n- Update to containerd v1.3.9, which is needed for Docker v19.03.14-ce and\n  fixes CVE-2020-15257. bsc#1180243\n\n- Update to containerd v1.3.7, which is required for Docker 19.03.13-ce.\n  bsc#1176708\n\n- Update to Docker 19.03.14-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. CVE-2020-15257 bsc#1180243\n  https://github.com/docker/docker-ce/releases/tag/v19.03.14\n\n- Enable fish-completion\n\n- Add a patch which makes Docker compatible with firewalld with\n  nftables backend. Backport of https://github.com/moby/libnetwork/pull/2548\n  (bsc#1178801, SLE-16460)\n\n- Update to Docker 19.03.13-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. bsc#1176708\n\n- Fixes for %_libexecdir changing to /usr/libexec (bsc#1174075)\n\n- Emergency fix: %requires_eq does not work with provide symbols,\n  only effective package names. Convert back to regular Requires.\n\n- Update to Docker 19.03.12-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md.\n- Use Go 1.13 instead of Go 1.14 because Go 1.14 can cause all sorts of\n  spurrious errors due to Go returning -EINTR from I/O syscalls much more often\n  (due to Go 1.14's pre-emptive goroutine support).\n- Add BuildRequires for all -git dependencies so that we catch missing\n  dependencies much more quickly.\n\n- Update to libnetwork 55e924b8a842, which is required for Docker 19.03.14-ce.\n  bsc#1180243\n\n- Add patch which makes libnetwork compatible with firewalld with\n  nftables backend. Backport of https://github.com/moby/libnetwork/pull/2548\n  (bsc#1178801, SLE-16460)\n","status":"published","published":"2020-12-28T13:28:52Z","modified":"2026-02-04T02:49:48.26614Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0435-1","title":"Security update for containerd, docker, docker-runc, golang-github-docker-libnetwork","description":"This update for containerd, docker, docker-runc, golang-github-docker-libnetwork fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-15257: Fixed a privilege escalation in containerd (bsc#1178969).\n- CVE-2021-21284: potential privilege escalation when the root user in the remapped namespace has access to the host filesystem (bsc#1181732)\n- CVE-2021-21285: pulling a malformed Docker image manifest crashes the dockerd daemon (bsc#1181730)\n\nNon-security issues fixed:\n\n- Update Docker to 19.03.15-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. This update includes fixes for\n  bsc#1181732 (CVE-2021-21284) and bsc#1181730 (CVE-2021-21285).\n\n- Only apply the boo#1178801 libnetwork patch to handle firewalld on openSUSE.\n  It appears that SLES doesn't like the patch. (bsc#1180401)\n\n- Update to containerd v1.3.9, which is needed for Docker v19.03.14-ce and\n  fixes CVE-2020-15257. bsc#1180243\n\n- Update to containerd v1.3.7, which is required for Docker 19.03.13-ce.\n  bsc#1176708\n\n- Update to Docker 19.03.14-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. CVE-2020-15257 bsc#1180243\n  https://github.com/docker/docker-ce/releases/tag/v19.03.14\n\n- Enable fish-completion\n\n- Add a patch which makes Docker compatible with firewalld with\n  nftables backend. Backport of https://github.com/moby/libnetwork/pull/2548\n  (bsc#1178801, SLE-16460)\n\n- Update to Docker 19.03.13-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md. bsc#1176708\n\n- Fixes for %_libexecdir changing to /usr/libexec (bsc#1174075)\n\n- Emergency fix: %requires_eq does not work with provide symbols,\n  only effective package names. Convert back to regular Requires.\n\n- Update to Docker 19.03.12-ce. See upstream changelog in the packaged\n  /usr/share/doc/packages/docker/CHANGELOG.md.\n- Use Go 1.13 instead of Go 1.14 because Go 1.14 can cause all sorts of\n  spurrious errors due to Go returning -EINTR from I/O syscalls much more often\n  (due to Go 1.14's pre-emptive goroutine support).\n- Add BuildRequires for all -git dependencies so that we catch missing\n  dependencies much more quickly.\n\n- Update to libnetwork 55e924b8a842, which is required for Docker 19.03.14-ce.\n  bsc#1180243\n\n- Add patch which makes libnetwork compatible with firewalld with\n  nftables backend. Backport of https://github.com/moby/libnetwork/pull/2548\n  (bsc#1178801, SLE-16460)\n","status":"published","published":"2021-02-11T13:47:59Z","modified":"2026-02-04T04:04:45.22277Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2025:03540-1","title":"Security update for docker-stable","description":"This update for docker-stable fixes the following issues:\n\n- Include historical changelog data from before the docker-stable fork. The\n  initial changelog entry did technically provide all the necessary\n  information, but our CVE tracking tools do not understand how the package is\n  forked and so it seems that this package does not include fixes for ~12 years\n  of updates. So, include a copy of the original package's changelog up until\n  the fork point. (bsc#1250596)\n\n- Remove git-core recommends on SLE. Most SLE systems have\n  installRecommends=yes by default and thus end up installing git with Docker.\n  bsc#1250508\n\n  This feature is mostly intended for developers ('docker build git://') so\n  most users already have the dependency installed, and the error when git is\n  missing is fairly straightforward (so they can easily figure out what they\n  need to install).\n\n- Backport \u003chttps://github.com/moby/moby/pull/48517\u003e. bsc#1247362\n\n- Update to docker-buildx v0.25.0. Upstream changelog:\n  \u003chttps://github.com/docker/buildx/releases/tag/v0.25.0\u003e\n\n- Do not try to inject SUSEConnect secrets when in Rootless Docker mode, as\n  Docker does not have permission to access the host zypper credentials in this\n  mode (and unprivileged users cannot disable the feature using\n  /etc/docker/suse-secrets-enable.) bsc#1240150\n\n- Initial docker-stable fork, forked from Docker 24.0.7-ce release\n  (packaged on 2024-02-14). The original changelog is included below for\n  historical reference.\n","status":"published","published":"2025-10-10T19:04:02Z","modified":"2026-02-04T02:38:37.010407Z","updated_at":"2026-11-02T15:53:58.883365Z"},{"id":"SUSE-SU-2025:03545-1","title":"Security update for docker-stable","description":"This update for docker-stable fixes the following issues:\n\nNote this update contains a already fixed references mostly.\n\n- Remove git-core recommends on SLE to avoid pulling it in unnecessary. (bsc#1250508)\n\n  This feature is mostly intended for developers ('docker build git://') so\n  most users already have the dependency installed, and the error when git is\n  missing is fairly straightforward (so they can easily figure out what they\n  need to install).\n\n- Include historical changelog data from before the docker-stable fork. The\n  initial changelog entry did technically provide all the necessary\n  information, but our CVE tracking tools do not understand how the package is\n  forked and so it seems that this package does not include fixes for ~12 years\n  of updates. So, include a copy of the original package's changelog up until\n  the fork point. bsc#1250596\n\n- Update to docker-buildx v0.25.0. Upstream changelog:\n  \u003chttps://github.com/docker/buildx/releases/tag/v0.25.0\u003e\n\n- Update to Go 1.23 for building now that upstream has switched their 23.0.x\n  LTSS to use Go 1.23.\n\n- Do not try to inject SUSEConnect secrets when in Rootless Docker mode, as\n  Docker does not have permission to access the host zypper credentials in this\n  mode (and unprivileged users cannot disable the feature using\n  /etc/docker/suse-secrets-enable.) bsc#1240150\n\n- Initial docker-stable fork, forked from Docker 24.0.7-ce release\n  (packaged on 2024-02-14). The original changelog is included below for\n  historical reference.\n","status":"published","published":"2025-10-11T01:20:50Z","modified":"2026-03-23T04:48:05.17767Z","updated_at":"2026-11-02T15:53:58.883365Z"},{"id":"USN-4653-1","title":"containerd vulnerability","description":"It was discovered that access controls for the shim’s API socket did not\nrestrict access to the abstract unix domain socket in some cases. An attacker\ncould use this vulnerability to run containers with elevated privileges.\n","status":"published","published":"2020-11-30T21:04:43Z","modified":"2026-02-10T04:41:59Z","updated_at":"2026-11-02T16:58:15.159055Z"},{"id":"USN-4653-2","title":"containerd vulnerability","description":"USN-4653-1 fixed a vulnerability in containerd. Unfortunately, those containerd packages introduced a regression in docker.io and the update was reverted. This update addresses the docker.io issue and reintroduces the fixes from USN-4653-1. We apologize for the inconvenience.\n","status":"published","published":"2021-01-13T20:43:32Z","modified":"2026-02-10T04:41:59Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}