CVE-2026-76929: CWE-125: Out-of-bounds Read in Wireshark Foundation Wireshark
CVE-2026-76929 is an out-of-bounds read vulnerability in the pcapng file parser 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. The vulnerability has a medium severity rating with a CVSS score of 4.7. No official patch or remediation guidance is currently available from the vendor.
AI Analysis
Technical Summary
This vulnerability (CWE-125) involves an out-of-bounds read in the pcapng file parser component of Wireshark Foundation's Wireshark software. Specifically, affected versions include 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. The flaw allows crafted pcapng files to cause the application to crash, leading to denial of service. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and user interaction, with no impact on confidentiality or integrity but a high impact on availability.
Potential Impact
Successful exploitation results in denial of service by crashing Wireshark when processing specially crafted pcapng files. There is no confidentiality or integrity impact. The attack requires local access and user interaction, limiting remote exploitation potential.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted pcapng files with affected versions of Wireshark. Monitor vendor channels for updates.
CVE-2026-76929: CWE-125: Out-of-bounds Read in Wireshark Foundation Wireshark
Description
CVE-2026-76929 is an out-of-bounds read vulnerability in the pcapng file parser 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. The vulnerability has a medium severity rating with a CVSS score of 4.7. No official patch or remediation guidance is currently available from the vendor.
CVSS v3.1
Score 4.7medium
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
This vulnerability (CWE-125) involves an out-of-bounds read in the pcapng file parser component of Wireshark Foundation's Wireshark software. Specifically, affected versions include 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. The flaw allows crafted pcapng files to cause the application to crash, leading to denial of service. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and user interaction, with no impact on confidentiality or integrity but a high impact on availability.
Potential Impact
Successful exploitation results in denial of service by crashing Wireshark when processing specially crafted pcapng files. There is no confidentiality or integrity impact. The attack requires local access and user interaction, limiting remote exploitation potential.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted pcapng files with affected versions of Wireshark. Monitor vendor channels for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T23:00:01.547Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a863747acd9273b49bc7c14
Added to database: 08/19/2026, 23:07:51 UTC
Last enriched: 08/19/2026, 23:25:18 UTC
Last updated: 08/19/2026, 23:37:09 UTC
Views: 4
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