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ALSA-2021:4154 — Moderate: container-tools:rhel8 security, bug fix, and enhancement update

Affected: AlmaLinux:8: crit, AlmaLinux:8: criu, AlmaLinux:8: criu-devel, AlmaLinux:8: criu-libs, AlmaLinux:8: libslirp, AlmaLinux:8: libslirp-devel, AlmaLinux:8: oci-seccomp-bpf-hook, AlmaLinux:8: python3-criu, AlmaLinux:8: slirp4netns, AlmaLinux:8: toolbox and 1 more

The container-tools module contains tools for working with containers, notably podman, buildah, skopeo, and runc.

Security Fix(es):

* buildah: Host environment variables leaked in build container when using chroot isolation (CVE-2021-3602)

* containers/storage: DoS via malicious image (CVE-2021-20291)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

EUVD-2026-21610

fkie_cve-2021-20291

A deadlock vulnerability was found in 'github.com/containers/storage' in versions before 1.28.1. When a container image is processed, each layer is unpacked using `tar`. If one of those layers is not a valid `tar` archive this causes an error leading to an unexpected situation where the code indefinitely waits for the tar unpacked stream, which never finishes. An attacker could use this vulnerability to craft a malicious image, which when downloaded and stored by an application using containers/storage, would then cause a deadlock leading to a Denial of Service (DoS).

GHSA-7qw8-847f-pggm — Improper Locking in github.com/containers/storage

Affected: Go: github.com/containers/storage

A deadlock vulnerability was found in `github.com/containers/storage` in versions before 1.28.1. When a container image is processed, each layer is unpacked using `tar`. If one of those layers is not a valid `tar` archive this causes an error leading to an unexpected situation where the code indefinitely waits for the tar unpacked stream, which never finishes. An attacker could use this vulnerability to craft a malicious image, which when downloaded and stored by an application using containers/storage, would then cause a deadlock leading to a Denial of Service (DoS).

gsd-2021-20291

openSUSE-SU-2022:23018-1 — Security update for conmon, libcontainers-common, libseccomp, podman

Security update for conmon, libcontainers-common, libseccomp, podman

RHSA-2021:1150 — Red Hat Security Advisory: OpenShift Container Platform 4.7.7 security update

containers/storage: DoS via malicious image

SUSE-SU-2022:23018-1 — Security update for conmon, libcontainers-common, libseccomp, podman

Security update for conmon, libcontainers-common, libseccomp, podman

UBUNTU-CVE-2021-20291

Affected: Ubuntu:20.04:LTS: golang-github-containers-storage