CVE-2026-9759: NULL Pointer Dereference in Wireshark
Published May 27, 2026
·Updated
ROHC protocol dissector crash in Wireshark 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15 allows denial of service
Affected Software
3 affected components
Wireshark Wireshark>=4.6.0<=4.6.5, >=4.4.0<=4.4.15
Wireshark Wireshark>=4.4.0<4.4.16
Wireshark Wireshark>=4.6.0<4.6.6
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 4.6.6
Event History
May 27, 2026
CVE Published
via MITRE·06:33 PM
Data Sourced
via MITRE·06:33 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:16 PM
DescriptionSeverityWeaknessAffected Software
Jun 29, 58424
Event
via FIRST·12:24 PM
Frequently Asked Questions
1
What is the severity of CVE-2026-9759?
The severity of CVE-2026-9759 is classified as medium with a score of 5.5.
2
What type of vulnerability is CVE-2026-9759?
CVE-2026-9759 is a NULL Pointer Dereference vulnerability in the ROHC protocol dissector of Wireshark.
3
What versions of Wireshark are affected by CVE-2026-9759?
CVE-2026-9759 affects Wireshark versions 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15.
4
How do I fix CVE-2026-9759?
To fix CVE-2026-9759, upgrade to Wireshark version 4.6.6 or above.
5
What impact does CVE-2026-9759 have on Wireshark?
CVE-2026-9759 can cause a denial of service by crashing the Wireshark application.