CVE-2026-5403
Heap-based Buffer Overflow in Wireshark
- State
- Published
- Severity
- 7.8 High
- Published
- Apr 30, 2026
- Updated
- Jul 15, 2026
- Reserved
- Apr 2, 2026
Description
SBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | GitLab |
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
WiresharkWireshark Foundation |
|
References
- https://www.wireshark.org/security/wnpa-sec-2026-16.html
- GitLab Issue #21103issue-trackingpermissions-required
- https://access.redhat.com/security/cve/CVE-2026-5403vdb-entry
- RHBZ#2464271issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5403.json
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