CVE-2026-123876

Description

A 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.

References

https://www.openwall.com/lists/oss-security/2026/10/27/3

https://github.com/podman-container-tools/container-libs/pull/1249

https://github.com/podman-container-tools/container-libs/issues/1248

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-118387

https://bugzilla.redhat.com/show_bug.cgi?id=2566536

https://access.redhat.com/security/cve/CVE-2026-123876

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS