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CVE-2026-91018

Double Free in lwIP (lightweight IP)

CVSS 3.1 8.8 HIGHCVSS 4.0 8.7 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-91018

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-91018

Published

lwIP API

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "lwIP",
                    "product": "lwIP API",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2.0.1",
                            "lessThanOrEqual": "2.2.1",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON