Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-25704

Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
30/03/2026
Last modified:
16/04/2026

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.<br /> <br /> <br /> <br /> <br /> This issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.

Impact

Vector 4.0
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 CVSS v4.0 Severity and Metrics:

Base Score: 5.80 MEDIUM
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

Attack Vector (AV): Local
Attack Complexity (AC): High
Attack Requirements (AT): None
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): Low
Integrity (VI): Low
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
5.80
Severity 4.0
MEDIUM

References to Advisories, Solutions, and Tools