{"id":"UBUNTU-CVE-2026-123876","details":"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.","modified":"2026-11-10T02:50:22.112358755Z","published":"2026-11-09T00:00:00Z","upstream":["CVE-2026-123876"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-123876"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-123876"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/10/27/3"},{"type":"REPORT","url":"https://github.com/podman-container-tools/container-libs/issues/1248"},{"type":"REPORT","url":"https://github.com/podman-container-tools/container-libs/pull/1249"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-123876"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2566536"}],"affected":[{"package":{"name":"golang-github-containers-common","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/golang-github-containers-common?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.38.16+ds1-1ubuntu1","0.44.3+ds1-2ubuntu1","0.44.4+ds1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-containers-common","binary_version":"0.44.4+ds1-1"},{"binary_name":"golang-github-containers-common-dev","binary_version":"0.44.4+ds1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123876.json"}},{"package":{"name":"golang-github-containers-common","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-github-containers-common?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.50.1+ds1-4","0.56.0+ds1-4","0.57.0+ds1-2","0.57.2+ds1-2","0.57.4+ds1-2","0.57.4+ds1-2ubuntu0.1","0.57.4+ds1-2ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.57.4+ds1-2ubuntu0.2","binary_name":"golang-github-containers-common"},{"binary_name":"golang-github-containers-common-dev","binary_version":"0.57.4+ds1-2ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123876.json"}},{"package":{"name":"golang-github-containers-common","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/golang-github-containers-common?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.66.0+ds2-3","0.67.1-2","0.67.1-3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.67.1-3","binary_name":"golang-github-containers-common"},{"binary_name":"golang-github-containers-common-dev","binary_version":"0.67.1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123876.json"}},{"package":{"name":"golang-github-containers-common","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-github-containers-common?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.62.2+ds1-2","0.66.0+ds2-3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.66.0+ds2-3","binary_name":"golang-github-containers-common"},{"binary_name":"golang-github-containers-common-dev","binary_version":"0.66.0+ds2-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123876.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}