PT-2026-28805 · Pop Os · Cosmic-Greeter

Matthias Gerstner · Published 2026-03-30 · Updated 2026-03-30 · CVE-2026-25704

NVD

CVSS v4.0

5.8

Medium

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

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.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-271

CWE-367

Related Identifiers

CVE-2026-25704

Affected Products

Cosmic-Greeter

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-25704 · Security Note
• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704 · Note