{"id":"CVE-2026-123876","aliases":[],"cve":{"records":[{"id":"CVE-2026-123876","source":"redhat","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T16:23:26.995Z","published":"2026-11-06T17:38:41.186Z","modified":"2026-11-13T13:30:43.386Z"}],"publishers":[{"name":"redhat","role":"CNA","organizationId":"53f830b8-0a3f-465b-8143-3b8a9948e749","modified":"2026-11-13T13:30:43.386Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-10T19:57:56.860Z"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:88737","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-123876","tags":["vdb-entry","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2566536","tags":["issue-tracking","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://github.com/podman-container-tools/container-libs/issues/1248","tags":[],"source":"redhat"},{"url":"https://github.com/podman-container-tools/container-libs/pull/1249","tags":[],"source":"redhat"},{"url":"https://www.openwall.com/lists/oss-security/2026/10/27/3","tags":[],"source":"redhat"},{"url":"https://github.com/podman-container-tools/container-libs/issues/1248","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-184","description":"Incomplete List of Disallowed Inputs","source":"redhat"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-10T19:57:30.881325Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Podman: containers-common: containers-common: default seccomp af_vsock/netlink_audit deny rules bypassable via 32-bit truncation","titleSource":"redhat","descriptionSource":"redhat","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rules.","score":4.4,"severity":"medium","published":"2026-11-06T17:38:41.186Z","modified":"2026-11-13T13:30:43.386Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Red Hat","name":"Red Hat Hardened Images","platforms":[],"versions":[{"version":"0.70.0-1.hum1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/a:redhat:hummingbird:1"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:10"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/a:redhat:enterprise_linux:8"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 9","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:9"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat Hardened Images","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:hummingbird:1"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat Hardened Images","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/a:redhat:hummingbird:1"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 4","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/a:redhat:openshift:4"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 4","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 4","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"vendor":"Red Hat","name":"Red Hat OpenShift Container Platform 5","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:5"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"}],"remediation":[{"text":"Enforcing SELinux may still deny vsock; do not rely on the unfixed seccomp denies; ship SCMP_CMP_MASKED_EQ profile updates.","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"}],"references":["https://access.redhat.com/errata/RHSA-2026:88737","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"],"sources":[{"name":"CVE","id":"CVE-2026-123876","modified":"2026-11-13T13:30:43.386Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"}],"assessments":[{"source":"redhat","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":4.4}],"sourceAffected":[],"observedAt":"2026-11-13T18:02:21.041Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:10:34.932Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-06T22:00:31.724Z","attemptedAt":"2026-11-06T22:00:31.724Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-06T22:00:31.725Z","attemptedAt":"2026-11-06T22:00:31.725Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-06T22:00:31.725Z","attemptedAt":"2026-11-06T22:00:31.725Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-06T22:00:31.728Z","attemptedAt":"2026-11-06T22:00:31.728Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123876","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123876","modified":"2026-11-06T18:18:05.590","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","checkedAt":"2026-11-06T22:00:31.724Z"},{"source":"ENISA EUVD","id":"EUVD-2026-118387","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-118387","modified":"Nov 6, 2026, 9:33:05 PM","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","checkedAt":"2026-11-06T22:00:31.725Z"},{"source":"GitHub Advisory Database","id":"GHSA-2fgp-24rx-f2r7","url":"https://github.com/advisories/GHSA-2fgp-24rx-f2r7","modified":"2026-11-06T18:35:33Z","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","checkedAt":"2026-11-06T22:00:31.725Z"}],"aiSummary":{"text":"A flaw in Podman's default seccomp profile allows deny rules for AF_VSOCK and NETLINK_AUDIT to be bypassed via 32-bit truncation. The kernel truncates socket arguments to 32 bits, allowing upper bits to bypass the deny rules. Affected products include Red Hat Enterprise Linux 9 and 10.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T18:16:11.960Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"}]}}