CVE-2026-76927: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
H.245 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
AI Analysis
Technical Summary
This vulnerability is a NULL pointer dereference in the H.245 protocol dissector component of Wireshark versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. The flaw allows an attacker to cause a denial of service by crashing the application when processing crafted H.245 protocol data. The CVSS 3.1 base score is 4.7, reflecting a medium impact with local attack vector, high attack complexity, no privileges required, and user interaction needed. There is no indication of confidentiality or integrity impact, only availability is affected.
Potential Impact
Successful exploitation results in a denial of service by crashing Wireshark when it processes malicious H.245 protocol packets. There is no evidence of information disclosure or code execution. The impact is limited to availability disruption of the Wireshark application on the affected versions.
Mitigation Recommendations
No official patch or fix links are provided in the data. Patch status is not yet confirmed — check the Wireshark vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted H.245 protocol traffic or use a version of Wireshark outside the affected ranges.
CVE-2026-76927: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
Description
H.245 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
CVSS v3.1
Score 4.7medium
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
This vulnerability is a NULL pointer dereference in the H.245 protocol dissector component of Wireshark versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. The flaw allows an attacker to cause a denial of service by crashing the application when processing crafted H.245 protocol data. The CVSS 3.1 base score is 4.7, reflecting a medium impact with local attack vector, high attack complexity, no privileges required, and user interaction needed. There is no indication of confidentiality or integrity impact, only availability is affected.
Potential Impact
Successful exploitation results in a denial of service by crashing Wireshark when it processes malicious H.245 protocol packets. There is no evidence of information disclosure or code execution. The impact is limited to availability disruption of the Wireshark application on the affected versions.
Mitigation Recommendations
No official patch or fix links are provided in the data. Patch status is not yet confirmed — check the Wireshark vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted H.245 protocol traffic or use a version of Wireshark outside the affected ranges.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:59:51.521Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a863747acd9273b49bc7c10
Added to database: 08/19/2026, 23:07:51 UTC
Last enriched: 09/18/2026, 23:35:18 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 62
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