CVE-2026-6533
Improperly Controlled Sequential Memory Allocation in Wireshark
- State
- Published
- Severity
- 5.5 Medium
- Published
- Apr 30, 2026
- Updated
- Apr 30, 2026
- Reserved
- Apr 17, 2026
Description
Dissection engine LZ77 decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | GitLab |
Weaknesses
- CWE-1325 Improperly Controlled Sequential Memory Allocation
Affected Products
| Product | Versions |
|---|---|
WiresharkWireshark Foundation |
|
References
- https://www.wireshark.org/security/wnpa-sec-2026-28.html
- GitLab Issue #21127issue-trackingpermissions-required
- https://gitlab.com/wireshark/wireshark/-/work_items/21127exploit
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