CVE-2026-91018
High
Description
lwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system.
SeverityHigh
CVSS8.8
Exploit probability—
ProductlwIP API
PublishedSep 22, 2026
First seenSep 22, 2026
Weakness typeCWE-415CWE-415
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| lwIP lwIP API | 2.0.1 ≤ v ≤ 2.2.1 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.