CVE-2026-76928: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
A NULL pointer dereference vulnerability exists in the X.509IF protocol dissector of Wireshark versions 4.4.0 through 4.4.17 and 4.6.0 through 4.6.7. This flaw can cause the application to crash, resulting in a denial of service condition.
AI Analysis
Technical Summary
CVE-2026-76928 is a high-severity vulnerability in Wireshark's X.509IF protocol dissector affecting versions 4.4.0 to 4.4.17 and 4.6.0 to 4.6.7. The issue is a NULL pointer dereference (CWE-476) that leads to a crash of the Wireshark application, causing denial of service. The CVSS v3.1 base score is 7.5 with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation causes Wireshark to crash, resulting in denial of service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor Wireshark Foundation advisories for updates addressing this vulnerability. Until a patch is available, avoid processing untrusted X.509IF protocol data with affected versions.
CVE-2026-76928: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
Description
A NULL pointer dereference vulnerability exists in the X.509IF protocol dissector of Wireshark versions 4.4.0 through 4.4.17 and 4.6.0 through 4.6.7. This flaw can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 7.5high
Affected software
Wireshark Foundation
Wireshark
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-2026-76928 is a high-severity vulnerability in Wireshark's X.509IF protocol dissector affecting versions 4.4.0 to 4.4.17 and 4.6.0 to 4.6.7. The issue is a NULL pointer dereference (CWE-476) that leads to a crash of the Wireshark application, causing denial of service. The CVSS v3.1 base score is 7.5 with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation causes Wireshark to crash, resulting in denial of service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor Wireshark Foundation advisories for updates addressing this vulnerability. Until a patch is available, avoid processing untrusted X.509IF protocol data with affected versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:59:56.519Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a863747acd9273b49bc7c12
Added to database: 08/19/2026, 23:07:51 UTC
Last enriched: 09/11/2026, 02:47:17 UTC
Last updated: 10/02/2026, 14:46:10 UTC
Views: 75
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