CVE-2026-5403: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
A heap-based buffer overflow vulnerability exists in Wireshark versions 4. 6. 0 to 4. 6. 4 and 4. 4. 0 to 4. 4. 14 related to the SBC codec. This flaw can cause a crash leading to denial of service and may allow for possible code execution.
AI Analysis
Technical Summary
CVE-2026-5403 is a heap-based buffer overflow vulnerability (CWE-122) in the SBC codec implementation of Wireshark versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. This vulnerability can be triggered to cause a denial of service via application crash and potentially enable arbitrary code execution. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vulnerability requires local attack vector with low complexity and no privileges but user interaction is required. No official patch or fix has been documented in the provided data.
Potential Impact
Successful exploitation can lead to denial of service by crashing Wireshark and may allow an attacker to execute arbitrary code with the privileges of the user running the application. This impacts confidentiality, integrity, and availability of the affected system. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should avoid opening untrusted files containing SBC codec data in affected Wireshark versions. Monitor vendor channels for updates and apply patches promptly once available.
CVE-2026-5403: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Description
A heap-based buffer overflow vulnerability exists in Wireshark versions 4. 6. 0 to 4. 6. 4 and 4. 4. 0 to 4. 4. 14 related to the SBC codec. This flaw can cause a crash leading to denial of service and may allow for possible code execution.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5403 is a heap-based buffer overflow vulnerability (CWE-122) in the SBC codec implementation of Wireshark versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. This vulnerability can be triggered to cause a denial of service via application crash and potentially enable arbitrary code execution. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vulnerability requires local attack vector with low complexity and no privileges but user interaction is required. No official patch or fix has been documented in the provided data.
Potential Impact
Successful exploitation can lead to denial of service by crashing Wireshark and may allow an attacker to execute arbitrary code with the privileges of the user running the application. This impacts confidentiality, integrity, and availability of the affected system. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should avoid opening untrusted files containing SBC codec data in affected Wireshark versions. Monitor vendor channels for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-02T06:33:16.683Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f3e778cbff5d8610b741aa
Added to database: 4/30/2026, 11:36:24 PM
Last enriched: 4/30/2026, 11:51:39 PM
Last updated: 5/1/2026, 12:54:04 AM
Views: 5
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