{"id":"CVE-2026-8933","aliases":["DEBIAN-CVE-2026-8933","EUVD-2026-46262","GHSA-fxqr-j4gx-622c","UBUNTU-CVE-2026-8933","USN-8579-1"],"status":"published","title":"snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup","description":"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).\nDue 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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00309,"percentile":0.2392,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-250"],"published":"2026-07-21T14:00:00Z","modified":"2026-10-28T02:30:52Z","exploits":[{"source":"pocgithub","id":"songzzzz/CVE-2026-8933","title":"songzzzz/CVE-2026-8933","date":"2026-10-17","url":"https://github.com/songzzzz/CVE-2026-8933"},{"source":"pocgithub","id":"yifengchen-cc/CVE-2026-8933","title":"yifengchen-cc/CVE-2026-8933","date":"2026-10-23","url":"https://github.com/yifengchen-cc/CVE-2026-8933"}],"fixes":[{"ecosystem":"Debian:14","package":"snapd","fixed_in":["2.76.3-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"snapd","fixed_in":["2.76+ubuntu22.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"snapd","fixed_in":["2.76+ubuntu24.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"snapd","fixed_in":["2.76+ubuntu26.04.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.68.3-3","2.68.3-3+deb13u1","2.71-1","2.71-2","2.71-3","2.72-1","2.73-3","2.73-4","2.74.1-1","2.75.2-1","2.75.2-2","2.76-1","2.76.3-1","2.76.3-2","2.77.1-1"]},{"source":"osv","ecosystem":"Debian:14","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.76.3-1"}]}],"versions":["2.68.3-3","2.71-1","2.71-2","2.71-3","2.72-1","2.73-3","2.73-4","2.74.1-1","2.75.2-1","2.75.2-2","2.76-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.61.4ubuntu0.16.04.1+esm4"}]}],"versions":["1.9","1.9.1.1","1.9.2","2.0","2.0.1","2.0.2","2.0.3","2.0.5","2.0.8","2.0.9","2.0.10","2.11+0.16.04","2.12+0.16.04","2.13","2.14.2~16.04","2.15.2ubuntu1","2.16ubuntu3","2.17.1ubuntu1","2.20.1ubuntu1","2.21","2.22.2","2.22.3","2.22.6","2.23.1","2.24.1","2.25","2.26.10","2.27.5","2.28.5","2.29.4.2","2.32.3.2","2.32.9","2.33.1ubuntu2","2.34.2","2.34.2ubuntu0.1","2.37.4","2.37.4ubuntu0.1","2.38","2.39.2","2.39.2ubuntu0.2","2.40","2.42.1","2.45.1","2.45.1ubuntu0.2","2.46.1","2.47.1","2.48","2.48.3","2.54.3+16.04~esm2","2.54.3+16.04.0ubuntu0.1~esm3","2.54.3+16.04.0ubuntu0.1~esm4","2.54.3+16.04.0ubuntu0.1~esm5","2.54.3+16.04.0ubuntu0.1~esm6","2.61.4ubuntu0.16.04.1+esm1","2.61.4ubuntu0.16.04.1+esm2"],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.61.4ubuntu0.18.04.1+esm4"}]}],"versions":["2.28.5+17.10","2.29.4.1+18.04","2.29.4.2+18.04","2.31.1+18.04","2.32+18.04~pre5","2.32+18.04~pre6","2.32+18.04","2.32.3.2+18.04","2.32.5+18.04","2.32.8+18.04","2.32.9+18.04","2.33.1+18.04ubuntu2","2.34.2+18.04","2.34.2+18.04.1","2.37.1+18.04","2.37.1.1+18.04","2.37.4+18.04","2.37.4+18.04.1","2.38+18.04","2.39.2+18.04","2.40+18.04","2.42.1+18.04","2.45.1+18.04","2.45.1+18.04.2","2.46.1+18.04","2.47.1+18.04","2.48+18.04","2.48.3+18.04","2.49.2+18.04","2.51.1+18.04","2.54.2+18.04ubuntu1","2.54.3+18.04","2.54.3+18.04.2ubuntu0.1","2.54.3+18.04.2ubuntu0.2","2.55.5+18.04","2.57.5+18.04","2.57.5+18.04ubuntu0.1","2.58+18.04","2.58+18.04.1","2.61.4ubuntu0.18.04.1+esm1","2.61.4ubuntu0.18.04.1+esm2"],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.67.1+20.04ubuntu1~esm3"}]}],"versions":["2.41+19.10.1","2.42.1+20.04","2.43.3+git1.8109f8","2.44~pre1+20.04","2.44+20.04","2.44.2+20.04","2.44.3+20.04","2.45.1+20.04","2.45.1+20.04.2","2.46.1+20.04","2.47.1+20.04","2.48+20.04","2.48.3+20.04","2.49.2+20.04","2.51.1+20.04ubuntu2","2.54.2+20.04ubuntu2","2.54.3+20.04","2.54.3+20.04.1","2.54.3+20.04.1ubuntu0.1","2.54.3+20.04.1ubuntu0.2","2.54.3+20.04.1ubuntu0.3","2.55.5+20.04","2.57.5+20.04","2.57.5+20.04ubuntu0.1","2.58+20.04","2.58+20.04.1","2.61.3+20.04","2.62+20.04","2.63+20.04","2.63+20.04ubuntu0.1","2.65.3+20.04","2.66.1+20.04","2.67.1+20.04","2.67.1+20.04ubuntu1~esm1"],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"snapd","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"],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"snapd","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"],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"snapd","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"],"bundled":3}],"products":[{"vendor":"canonical","product":"ubuntu 22.04 lts"},{"vendor":"canonical","product":"ubuntu 24.04 lts"},{"vendor":"canonical","product":"ubuntu 26.04 lts"}],"references":[{"url":"https://ubuntu.com/security/CVE-2026-8933","tags":["vdb-entry","issue-tracking","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8933","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-fxqr-j4gx-622c"},{"url":"https://github.com/canonical","tags":["web"]},{"url":"https://github.com/canonical/snapd/","tags":["web"]},{"url":"https://launchpad.net/ubuntu/+source/snapd","tags":["web"]},{"url":"https://launchpad.net/ubuntu/jammy","tags":["web"]},{"url":"https://launchpad.net/ubuntu/noble","tags":["web"]},{"url":"https://launchpad.net/ubuntu/resolute","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8933.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-8933","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-8933","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8579-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2024-5300","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-15226","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-8933","title":"snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup","description":"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).\nDue 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.","status":"published","published":"2026-07-21T14:02:19.758Z","modified":"2026-07-22T18:28:05.924Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-250"],"updated_at":"2026-11-02T13:48:02.226896Z"}],"euvd":[{"id":"EUVD-2026-46262","description":"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).\nDue 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.","status":"published","published":"2026-07-21T14:02:19Z","modified":"2026-07-22T18:28:05Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:19:45.382067Z"}],"ghsa":[{"id":"GHSA-fxqr-j4gx-622c","title":"A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core...","description":"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).\nDue 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.","status":"published","published":"2026-07-21T15:30:45Z","modified":"2026-07-21T15:30:51Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-250"],"updated_at":"2026-11-02T15:09:37.555146Z"}],"nvd":[{"id":"CVE-2026-8933","description":"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).\nDue 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.","status":"published","published":"2026-07-21T15:16:39.563Z","modified":"2026-07-22T19:17:14.773Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-250"],"updated_at":"2026-11-02T14:12:31.024898Z"}],"osv":[{"id":"CVE-2026-8933","title":"snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup","description":"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).\nDue 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.","status":"published","published":"2026-07-21T14:02:19.758Z","modified":"2026-10-28T02:30:52.521193357Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-250"],"updated_at":"2026-11-02T15:45:19.210277Z"},{"id":"DEBIAN-CVE-2026-8933","description":"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.","status":"published","published":"2026-07-21T15:16:39.563Z","modified":"2026-10-01T03:03:52.329812072Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:05.506112Z"},{"id":"UBUNTU-CVE-2026-8933","description":"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.","status":"published","published":"2026-07-21T14:00:00Z","modified":"2026-07-29T10:19:02.882230613Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"USN-8579-1","title":"snapd vulnerabilities","description":"James Henstridge discovered that snapd's default apparmor template did\nnot restrict access to systemd-userdbd varlink interface. A local\nattacker could possibly use this issue to obtain sensitive information.\n(CVE-2024-5300)\n\nQualys discovered that snap-confine can be tricked to create\nattacker-controlled files at certain privileged locations. A local\nattacker could possibly use this issue to bypass intended restrictions\nand escalate privileges to root. This issue only affected\nUbuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-8933)\n\nZygmunt Krynicki discovered that snapd's default seccomp template\ndid not restrict the creation of executables with the set-user-ID\nattribute. A local attacker could possibly use this issue to create\nand execute setuid binaries. (CVE-2026-15226)","status":"published","published":"2026-07-21T14:24:27Z","modified":"2026-07-21T23:14:34.410163517Z","updated_at":"2026-11-02T16:58:25.103481Z"}]}}