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.
Metrics
CVSS 3.1 4.4/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Hardened Images | — |
| Red Hat | Red Hat Hardened Images | — |
| Red Hat | Red Hat Hardened Images | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — |
References
- https://access.redhat.com/security/cve/CVE-2026-123876
- https://bugzilla.redhat.com/show_bug.cgi?id=2566536
- https://github.com/podman-container-tools/container-libs/issues/1248
- https://github.com/podman-container-tools/container-libs/pull/1249
- https://www.openwall.com/lists/oss-security/2026/10/27/3
- https://github.com/podman-container-tools/container-libs/issues/1248
Timeline
- Published
- Nov 6, 2026
- Last modified
- Nov 13, 2026
- NVD status
- Awaiting Analysis