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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2025-9817

CVE-2025-9817

HIGH7.8

NULL Pointer Dereference in Wireshark

Published Sep 3, 2025

Modified 6 days ago

Fix available

Details

SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service

Affected Packages

Wireshark

Windows 10 (1507)Windows 10 (1607) / Server 2016Windows 10 (1809) / Server 2019Windows 10 (1903)Windows 10 (1909)

Fixed in:

4.4.9

References

https://gitlab.com/wireshark/wireshark/-/issues/20642

https://www.cve.org/CVERecord?id=CVE-2025-9817

https://www.wireshark.org/security/wnpa-sec-2025-03.html

CVSS Analysis

CVSS v3.1

7.8

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

7.8/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

Memory Safety

NULL Pointer Dereference

Ecosystems(17)

Windows 10 (1507)Windows 10 (1607) / Server 2016 Windows 10 (1809) / Server 2019 Windows 10 (1903)Windows 10 (1909)

Timeline

PublishedSep 3, 2025

ModifiedFeb 26, 2026

CVE-2025-9817 | Mondoo Vulnerability Intelligence