CVE-2025-4444 MEDIUM

CVE-2025-4444: Tor Onion Service Descriptor resource consumption

Vendor N/A
Product Tor
Weakness CWE-400
Published September 18, 2025
Last update September 18, 2025

CVSS base score

6.3/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

What the vulnerability does

01Description

A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the component Onion Service Descriptor Handler. Performing manipulation results in resource consumption. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is considered difficult. Upgrading to version 0.4.8.18 and 0.4.9.3-alpha is recommended to address this issue. It is recommended to upgrade the affected component.

Key dates

02Disclosure timeline

September 18, 2025 CVE published
September 18, 2025 Record updated