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 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. 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 Foundation's Wireshark software affecting the X.509IF protocol dissector. The vulnerability is a NULL pointer dereference (CWE-476) that triggers a crash when processing certain malformed protocol data. Affected versions include 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. The impact is limited to denial of service, with no confidentiality or integrity loss indicated. There is no vendor advisory or patch information available at this time, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation causes a denial of service by crashing the Wireshark application when it processes crafted X.509IF protocol data. There is no indication of information disclosure or code execution.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted X.509IF protocol data with affected Wireshark versions to mitigate risk.
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 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. This flaw can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 7.5high
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-2026-76928 is a high severity vulnerability in Wireshark Foundation's Wireshark software affecting the X.509IF protocol dissector. The vulnerability is a NULL pointer dereference (CWE-476) that triggers a crash when processing certain malformed protocol data. Affected versions include 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. The impact is limited to denial of service, with no confidentiality or integrity loss indicated. There is no vendor advisory or patch information available at this time, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation causes a denial of service by crashing the Wireshark application when it processes crafted X.509IF protocol data. There is no indication of information disclosure or code execution.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted X.509IF protocol data with affected Wireshark versions to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:59:56.519Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a863747acd9273b49bc7c12
Added to database: 08/19/2026, 23:07:51 UTC
Last enriched: 08/19/2026, 23:22:03 UTC
Last updated: 08/19/2026, 23:22:03 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.