CVE-2026-9759: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
A NULL pointer dereference vulnerability exists in the ROHC protocol dissector of Wireshark versions 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15. This flaw can cause the application to crash, resulting in a denial of service condition.
AI Analysis
Technical Summary
CVE-2026-9759 is a NULL pointer dereference vulnerability (CWE-476) in the ROHC protocol dissector component of Wireshark versions 4.6.0 through 4.6.5 and 4.4.0 through 4.4.15. This vulnerability can be triggered by crafted input causing the application to crash, leading to denial of service. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, no privileges required, and user interaction needed. The vulnerability affects only the availability of the application, with no impact on confidentiality or integrity. No patch or official remediation level has been disclosed by the Wireshark Foundation as of the published date.
Potential Impact
Successful exploitation results in denial of service by crashing the Wireshark application when processing malformed ROHC protocol data. There is no impact on confidentiality or integrity. The attack requires local access and user interaction to trigger the vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Wireshark Foundation advisory for current remediation guidance. Until a fix is available, users should avoid processing untrusted ROHC protocol data and consider running Wireshark with least privileges. Monitor official Wireshark channels for updates and patches addressing this issue.
CVE-2026-9759: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
Description
A NULL pointer dereference vulnerability exists in the ROHC protocol dissector of Wireshark versions 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15. This flaw can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 5.5medium
Affected software
pkg:github/wireshark/wiresharkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9759 is a NULL pointer dereference vulnerability (CWE-476) in the ROHC protocol dissector component of Wireshark versions 4.6.0 through 4.6.5 and 4.4.0 through 4.4.15. This vulnerability can be triggered by crafted input causing the application to crash, leading to denial of service. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, no privileges required, and user interaction needed. The vulnerability affects only the availability of the application, with no impact on confidentiality or integrity. No patch or official remediation level has been disclosed by the Wireshark Foundation as of the published date.
Potential Impact
Successful exploitation results in denial of service by crashing the Wireshark application when processing malformed ROHC protocol data. There is no impact on confidentiality or integrity. The attack requires local access and user interaction to trigger the vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Wireshark Foundation advisory for current remediation guidance. Until a fix is available, users should avoid processing untrusted ROHC protocol data and consider running Wireshark with least privileges. Monitor official Wireshark channels for updates and patches addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-05-27T18:16:39.521Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a17476ae29bf47b50e35432
Added to database: 05/27/2026, 19:35:06 UTC
Last enriched: 06/03/2026, 20:58:17 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 1735
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