CVE-2026-25704

MEDIUM

Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData

Title source: cna

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.

References (2)

Core 2

Core References

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704

Mailing List

http://www.openwall.com/lists/oss-security/2026/04/16/3

Scores

CVSS v4 5.8

EPSS 0.0009

EPSS Percentile 0.5%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-271 CWE-367

Status published

Products (1)

pop-os/cosmic-greeter ? - https://github.com/pop-os/cosmic-greeter/pull/426

Published Mar 30, 2026

Tracked Since Mar 30, 2026