Vulnerability · Published Mar 30, 2026 · Assigned by suse
CVE-2026-25704Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData
Medium 5.8
In plain English
A medium-severity security flaw in cosmic-greeter from pop-os. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities).
Severity (CVSS 4.0)5.8Medium
Exploit odds (30 days)<0.1%top 99.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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. This issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pop-os | cosmic-greeter | ? – before https://github.com/pop-os/cosmic-greeter/pull/426 |
Weakness: CWE-271, CWE-367 · 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