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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| 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 OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | golang-github-containers-common | No fix yet | — |
| Debian 13 | golang-github-containers-common | No fix yet | — |
| Debian 12 | golang-github-containers-common | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | podman +2 | No fix yet | — |
| Ubuntu 26.04 LTS | podman +2 | No fix yet | — |
| Ubuntu 24.04 LTS | golang-github-containers-common | No fix yet | — |
| Ubuntu 22.04 LTS | golang-github-containers-common | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | skopeo | No fix yet | — |
| Ubuntu Pro 22.04 LTS | skopeo | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | containers-common +1 | 5:0.70.0-1.hum1 | RHSA-2026:88737 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | podman | 5.8.10-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | cri-o +5 | No fix yet | — |
Advisories 1
- RHSA-2026:88737 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
References
- RHSA-2026:88737 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-123876 vdb-entry
- RHBZ#2566536 issue-tracking
- 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