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 to 4.6.4. This vulnerability allows an attacker to cause a denial of service and may enable arbitrary code execution. The vulnerability is classified under CWE-122. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts to confidentiality, integrity, and availability. The Red Hat advisory linked does not specify an official patch or remediation status.
Potential Impact
Successful exploitation of this vulnerability can result in denial of service by crashing the Wireshark application and may also allow execution of arbitrary code, potentially compromising the host system's confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor the official Wireshark and Red Hat advisories for updates and apply any released patches promptly. Until a fix is available, avoid analyzing untrusted TLS traffic with affected Wireshark versions.
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
CVSS v3.1
Score 8.8high
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-2026-5402 is a heap-based buffer overflow vulnerability in the TLS protocol dissector component of Wireshark versions 4.6.0 to 4.6.4. This vulnerability allows an attacker to cause a denial of service and may enable arbitrary code execution. The vulnerability is classified under CWE-122. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts to confidentiality, integrity, and availability. The Red Hat advisory linked does not specify an official patch or remediation status.
Potential Impact
Successful exploitation of this vulnerability can result in denial of service by crashing the Wireshark application and may also allow execution of arbitrary code, potentially compromising the host system's confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor the official Wireshark and Red Hat advisories for updates and apply any released patches promptly. Until a fix is available, avoid analyzing untrusted TLS traffic with affected Wireshark versions.
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
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-5402","vendor":"Red Hat"}]
Threat ID: 69f2f4e6cbff5d8610970aaf
Added to database: 04/30/2026, 06:21:26 UTC
Last enriched: 07/15/2026, 09:32:53 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 188
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