CVE-2026-5402: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
AI Analysis
Technical Summary
CVE-2026-5402 is a heap-based buffer overflow vulnerability in the TLS protocol dissector component of Wireshark versions 4.6.0 through 4.6.4. This vulnerability allows an attacker to cause a denial of service or possibly execute arbitrary code by sending specially crafted TLS packets that trigger the overflow during packet dissection. The vulnerability has a CVSS v3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. As of the published date, no official fix or patch has been released by the Wireshark Foundation.
Potential Impact
Successful exploitation can result in denial of service by crashing Wireshark or potentially allow remote code execution within the context of the user running Wireshark. This impacts the confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Wireshark Foundation advisory for current remediation guidance. Until a patch is available, avoid analyzing untrusted or suspicious TLS traffic with affected Wireshark versions. Consider using alternative tools or updated versions once released.
CVE-2026-5402: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Description
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5402 is a heap-based buffer overflow vulnerability in the TLS protocol dissector component of Wireshark versions 4.6.0 through 4.6.4. This vulnerability allows an attacker to cause a denial of service or possibly execute arbitrary code by sending specially crafted TLS packets that trigger the overflow during packet dissection. The vulnerability has a CVSS v3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. As of the published date, no official fix or patch has been released by the Wireshark Foundation.
Potential Impact
Successful exploitation can result in denial of service by crashing Wireshark or potentially allow remote code execution within the context of the user running Wireshark. This impacts the confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Wireshark Foundation advisory for current remediation guidance. Until a patch is available, avoid analyzing untrusted or suspicious TLS traffic with affected Wireshark versions. Consider using alternative tools or updated versions once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-02T06:33:11.664Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f2f4e6cbff5d8610970aaf
Added to database: 4/30/2026, 6:21:26 AM
Last enriched: 4/30/2026, 6:36:18 AM
Last updated: 4/30/2026, 11:19:30 AM
Views: 10
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