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ALSA-2026:37123 — Important: podman security, bug fix, and enhancement update

2026-10-03T04:05:36.050882+00:00

Affected: AlmaLinux:9: podman, AlmaLinux:9: podman-docker, AlmaLinux:9: podman-plugins, AlmaLinux:9: podman-remote, AlmaLinux:9: podman-tests

The podman tool manages pods, container images, and containers. It is part of the libpod library, which is for applications that use container pods. Container pods is a concept in Kubernetes.

Security Fix(es):

* golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate (CVE-2026-39835) * golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters (CVE-2026-39829) * golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to improper handling of key restrictions (CVE-2026-39832) * golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypto/ssh/knownhosts: Revocation bypass via unchecked SignatureKey (CVE-2026-42508) * golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via HTML parsing bypass (CVE-2026-27136) * golang.org/x/net/html: golang.org/x/net/html: Arbitrary code execution via Cross-Site Scripting (CVE-2026-25681) * podman: Podman: Information disclosure via malicious container image environment variables (CVE-2026-57231)

Bug Fix(es) and Enhancement(s):

* podman does not clean up all files and leaves orphaned files consuming disk space [almalinux-9.8.z] (JIRA:AlmaLinux-173988) * [FJ9.8 Bug]: [REG]The "podman-remote save" command fails for rootless users. [almalinux-9.8.z] (JIRA:AlmaLinux-192439)

For more details about the security issue(s), including the impact, a CVSS score, acknowled…

BELL-CVE-2026-57231

2026-10-03T04:05:36.051022+00:00

Affected: Alpaquita:stream: podman

certfr-2026-avi-0955 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Red Hat. Certaines d'entre elles permettent à un…

2026-10-03T04:05:36.051053+00:00

certfr-2026-avi-0955

EUVD-2026-330840

2026-10-03T04:05:36.051080+00:00

EUVD-2026-330840

fkie_cve-2026-57231

2026-10-03T04:05:36.051099+00:00

Podman is a tool for managing OCI containers and pods. From 1.8.1 until 5.8.4, a container image that contains a environment variable with just a key and no value can trick podman into passing that variable from the host into the container. This is made worse by the fact that using an asterisk (*) will cause podman to pass all host variables into the container. So essentially a malicious image can exfiltrate all podman environment variables that are set in the session from where the container is launched. This vulnerability is fixed in 5.8.4 and 6.0.0.

GHSA-4hq8-gpf5-8p68 — Podman: Malformed Image can trick podman run into leaking host environment variables into the container

2026-10-03T04:05:36.051140+00:00

Affected: Go: github.com/containers/podman/v5, Go: go.podman.io/podman/v6, Go: github.com/containers/podman/v4, Go: github.com/containers/podman/v3, Go: github.com/containers/podman/v2, Go: github.com/containers/podman

## Summary

An container image that contains a environment variable with just a key and no value can trick podman into passing that variable from the host into the container. This is made worse by the fact that using an asterisk (*) will cause podman to pass all host variables into the container. So essentially a malicious image can exfiltrate all podman environment variables that are set in the session from where the container is launched.

## Details

podman run allows `--env VAR1` or `--env VAR*` which will read the variable values from the current environment and then passes them into the container. However because the same parsing logic was reused for the image config env section that means that an image variable could also gain access to that.

## Patch

That image spec requires the env variables to be in the form of `key=value`, so to address this invalid formatted variables get rejected and the container will not run.

Fixed in https://github.com/podman-container-tools/podman/commit/6c431b73dbf8e4b20b778644d7a80caebdb75050

## Workaround

Do not run untrusted images. Before running an image consider inspecting the config with `podman image inspect --format '{{.Config.Env}}' ` and check for any variables that do not have a value assigned.

msrc_CVE-2026-57231 — Podman: Malformed Image can trick podman run into leaking host environment variables into the container

2026-10-03T04:05:36.051249+00:00

msrc_CVE-2026-57231

openSUSE-SU-2026:11437-1 — podman-6.0.2-1.1 on GA media

2026-10-03T04:05:36.051290+00:00

podman-6.0.2-1.1 on GA media

RHSA-2026:29954 — Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

2026-10-03T04:05:36.051316+00:00

github.com/containers/podman: Podman: Host filesystem modification via malicious container image WORKDIR symlink podman: Podman: Information disclosure via malicious container image environment variables

RLSA-2026:37072 — Important: podman security, bug fix, and enhancement update

2026-10-03T04:05:36.051337+00:00

Affected: Rocky Linux:10: podman

The podman tool manages pods, container images, and containers. It is part of the libpod library, which is for applications that use container pods. Container pods is a concept in Kubernetes.

Security Fix(es):

* golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate (CVE-2026-39835)

* golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters (CVE-2026-39829)

* golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses (CVE-2026-39830)

* golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to improper handling of key restrictions (CVE-2026-39832)

* golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypto/ssh/knownhosts: Revocation bypass via unchecked SignatureKey (CVE-2026-42508)

* golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via HTML parsing bypass (CVE-2026-27136)

* golang.org/x/net/html: golang.org/x/net/html: Arbitrary code execution via Cross-Site Scripting (CVE-2026-25681)

* podman: Podman: Information disclosure via malicious container image environment variables (CVE-2026-57231)

Bug Fix(es) and Enhancement(s):

* podman does not clean up all files and leaves orphaned files consuming disk space [rhel-10.2.z] (JIRA:Rocky Linux-173842)

* [FJ10.2 Bug]: [REG]The "podman-remote save" command fails for rootless users. [rhel-10.2.z] (JI…

SUSE-SU-2026:23205-1 — Security update for podman

2026-10-03T04:05:36.051378+00:00

Security update for podman

UBUNTU-CVE-2026-57231

2026-10-03T04:05:36.051395+00:00

Affected: Ubuntu:25.10: podman, Ubuntu:26.04:LTS: podman

WID-SEC-W-2026-2062 — Podman: Schwachstelle ermöglicht Offenlegung von Informationen

2026-10-03T04:05:36.051418+00:00

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Podman ausnutzen, um Informationen offenzulegen.