{"id":"CVE-2026-25704","aliases":["EUVD-2026-17067","GHSA-h5vx-6jh5-qhq7"],"status":"published","title":"Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData","description":"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in  cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.","severity":{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00084,"percentile":0.00243,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-271","CWE-367"],"published":"2026-03-30T07:44:39Z","modified":"2026-06-17T10:25:04Z","products":[{"vendor":"pop-os","product":"cosmic-greeter"}],"references":[{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704"},{"url":"http://www.openwall.com/lists/oss-security/2026/04/16/3"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25704"},{"url":"https://github.com/advisories/GHSA-h5vx-6jh5-qhq7"}],"sources":{"cve":[{"id":"CVE-2026-25704","title":"Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData","description":"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in  cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.","status":"published","published":"2026-03-30T07:44:39.672Z","modified":"2026-04-16T16:32:11.153Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-271","CWE-367"],"updated_at":"2026-11-02T13:41:19.694734Z"}],"euvd":[{"id":"EUVD-2026-17067","description":"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in  cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.","status":"published","published":"2026-03-30T07:44:39Z","modified":"2026-04-16T16:32:11Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:24:23.841547Z"}],"ghsa":[{"id":"GHSA-h5vx-6jh5-qhq7","title":"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition...","description":"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in  cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.","status":"published","published":"2026-03-30T09:31:28Z","modified":"2026-04-16T18:32:18Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-271"],"updated_at":"2026-11-02T15:07:31.795355Z"}],"nvd":[{"id":"CVE-2026-25704","description":"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in  cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.","status":"published","published":"2026-03-30T08:16:16.99Z","modified":"2026-06-17T10:25:04.88Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-271","CWE-367"],"updated_at":"2026-11-02T14:12:12.261218Z"}]}}