CVE-2026-123876

NameCVE-2026-123876
DescriptionA flaw was found in the default seccomp profile used by Podman via containers-common. Deny rules for AF_VSOCK and NETLINK_AUDIT compared socket arguments with unmasked 64-bit equality. Because the kernel truncates those int arguments to 32 bits, setting upper bits can bypass the deny rules.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
podman (PTS)trixie5.4.2+ds1-2vulnerable
forky, sid5.8.6+ds1-3vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
podmansource(unstable)(unfixed)

Notes

https://www.openwall.com/lists/oss-security/2026/10/27/3
https://github.com/podman-container-tools/container-libs/issues/1248
https://github.com/podman-container-tools/container-libs/pull/1249
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