{"id":"UBUNTU-CVE-2026-8933","details":"A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.","modified":"2026-07-29T10:19:02.882230613Z","published":"2026-07-21T14:00:00Z","related":["USN-8579-1"],"upstream":["CVE-2026-8933"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-8933"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-8933"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8579-1"}],"affected":[{"package":{"name":"snapd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/snapd?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.76+ubuntu22.04.1"}]}],"versions":["2.53+21.10ubuntu1","2.54.2+22.04ubuntu1","2.54.2+22.04ubuntu2","2.54.2+22.04ubuntu3","2.54.3+git19.g868fc21+22.04","2.54.3+git26.g360067e+22.04","2.55.2+22.04","2.55.2+22.04.1","2.55.3+22.04","2.55.3+22.04ubuntu1","2.55.5+22.04","2.56.2+22.04ubuntu1","2.57.4+22.04","2.57.5+22.04","2.57.5+22.04ubuntu0.1","2.58+22.04","2.58+22.04.1","2.61.3+22.04","2.62+22.04","2.63+22.04","2.63+22.04ubuntu0.1","2.65.3+22.04","2.66.1+22.04","2.67.1+22.04","2.68.5+ubuntu22.04.1","2.71+ubuntu22.04","2.72+ubuntu22.04","2.73+ubuntu22.04","2.73+ubuntu22.04.1","2.74.1+ubuntu22.04.4","2.75.2+ubuntu22.04","2.76+ubuntu22.04"],"ecosystem_specific":{"priority_reason":"Local Privilege Escalation","binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.76+ubuntu22.04.1"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.76+ubuntu22.04.1"},{"binary_name":"snap-confine","binary_version":"2.76+ubuntu22.04.1"},{"binary_name":"snapd","binary_version":"2.76+ubuntu22.04.1"},{"binary_version":"2.76+ubuntu22.04.1","binary_name":"snapd-xdg-open"},{"binary_version":"2.76+ubuntu22.04.1","binary_name":"ubuntu-core-launcher"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.76+ubuntu22.04.1"},{"binary_version":"2.76+ubuntu22.04.1","binary_name":"ubuntu-snappy"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.76+ubuntu22.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8933.json"}},{"package":{"name":"snapd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/snapd?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.76+ubuntu24.04.1"}]}],"versions":["2.60.4+23.10","2.61.3+24.04","2.62+24.04build1","2.63+24.04","2.63+24.04ubuntu0.1","2.63.1+24.04","2.65.3+24.04","2.66.1+24.04","2.67.1+24.04","2.68.5+ubuntu24.04.1","2.71+ubuntu24.04","2.72+ubuntu24.04","2.73+ubuntu24.04","2.73+ubuntu24.04.1","2.73+ubuntu24.04.2","2.74.1+ubuntu24.04.4","2.75.2+ubuntu24.04","2.76+ubuntu24.04"],"ecosystem_specific":{"priority_reason":"Local Privilege Escalation","binaries":[{"binary_version":"2.76+ubuntu24.04.1","binary_name":"golang-github-snapcore-snapd-dev"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.76+ubuntu24.04.1"},{"binary_name":"snap-confine","binary_version":"2.76+ubuntu24.04.1"},{"binary_version":"2.76+ubuntu24.04.1","binary_name":"snapd"},{"binary_version":"2.76+ubuntu24.04.1","binary_name":"snapd-xdg-open"},{"binary_name":"ubuntu-core-launcher","binary_version":"2.76+ubuntu24.04.1"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.76+ubuntu24.04.1"},{"binary_name":"ubuntu-snappy","binary_version":"2.76+ubuntu24.04.1"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.76+ubuntu24.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8933.json"}},{"package":{"name":"snapd","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/snapd?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.76+ubuntu26.04.3"}]}],"versions":["2.71.1+ubuntu25.10.1","2.72+ubuntu26.04.1","2.73+ubuntu26.04.1","2.74+ubuntu26.04","2.74.1+ubuntu26.04","2.74.1+ubuntu26.04.3","2.74.1+ubuntu26.04.4","2.75.2+ubuntu26.04.2","2.76+ubuntu26.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.76+ubuntu26.04.3"},{"binary_name":"snapd","binary_version":"2.76+ubuntu26.04.3"}],"availability":"No subscription required","priority_reason":"Local Privilege Escalation"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8933.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]}