CVE-2026-6867: CWE-1325: Improperly Controlled Sequential Memory Allocation in Wireshark Foundation Wireshark
SMB2 protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
AI Analysis
Technical Summary
This vulnerability (CVE-2026-6867) affects Wireshark Foundation's Wireshark software, specifically versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. It is caused by improper control of sequential memory allocation within the SMB2 protocol dissector, leading to a crash that results in denial of service. The CVSS 3.1 score is 5.5 (medium), with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing SMB2 protocol data. There is no impact on confidentiality or integrity. The attack requires local access and user interaction, limiting the scope of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution when analyzing SMB2 traffic with affected Wireshark versions and consider upgrading to later versions once available.
CVE-2026-6867: CWE-1325: Improperly Controlled Sequential Memory Allocation in Wireshark Foundation Wireshark
Description
SMB2 protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-6867) affects Wireshark Foundation's Wireshark software, specifically versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. It is caused by improper control of sequential memory allocation within the SMB2 protocol dissector, leading to a crash that results in denial of service. The CVSS 3.1 score is 5.5 (medium), with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing SMB2 protocol data. There is no impact on confidentiality or integrity. The attack requires local access and user interaction, limiting the scope of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution when analyzing SMB2 traffic with affected Wireshark versions and consider upgrading to later versions once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-22T16:29:19.048Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f2f4eecbff5d8610970cc5
Added to database: 4/30/2026, 6:21:34 AM
Last enriched: 4/30/2026, 6:36:35 AM
Last updated: 4/30/2026, 9:51:33 AM
Views: 8
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