CVE-2025-4444

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 40.7% of scored records. A rank, not a probability.

NVD base score

6.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD 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/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

NVD analysis status

Deferred. NVD last modified this record on 2026-10-19.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-09-18 13:58Z1 YR AGO

Last updated

2025-09-18 20:41Z1 YR AGO

Reserved

2025-05-08

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA 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

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-404Improper Resource Shutdown or ReleaseClass

Data version

5.1

Document digest

ed6804ae2b7fb6e3c0045ca0031d88137c6f8e8206af8d9ac0f9d3f23975cece

• vuldb.comVDB-324814 | Tor Onion Service Descriptor resource consumptionhttps://vuldb.com/?id.324814vdb-entry
• vuldb.comVDB-324814 | CTI Indicators (IOB, IOC, TTP)https://vuldb.com/?ctiid.324814signaturepermissions-required
• vuldb.comSubmit #640605 | Tor ≤ 0.4.8 Memory Management vulnerabilityhttps://vuldb.com/?submit.640605third-party-advisory
• github.comhttps://github.com/chunmianwang/Tordosrelated
• gitlab.torproject.orghttps://gitlab.torproject.org/tpo/core/tor/-/raw/release-0.4.8/ReleaseNotesrelease-notes
• forum.torproject.orghttps://forum.torproject.org/t/alpha-and-stable-release-0-4-8-18-and-0-4-9-3-alpha/20578patch