{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91018", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-09-14T16:40:45.500Z", "datePublished": "2026-09-22T20:25:33.530Z", "dateUpdated": "2026-09-22T20:25:33.530Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-09-22T20:25:33.530Z"}, "title": "Double Free in lwIP (lightweight IP)", "datePublic": "2026-09-22T17:53:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-415", "description": "CWE-415 Double free", "type": "CWE"}]}], "affected": [{"vendor": "lwIP", "product": "lwIP API", "versions": [{"status": "affected", "version": "2.0.1", "lessThanOrEqual": "2.2.1", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "lwIP (Lightweight IP)\u00a0has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "lwIP (Lightweight IP)&nbsp;has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system."}]}], "references": [{"url": "https://cgit.git.savannah.gnu.org/cgit/lwip.git"}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02"}, {"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u00a0 https://cgit.git.savannah.gnu.org/cgit/lwip.git . The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at&nbsp;<a href=\"https://cgit.git.savannah.gnu.org/cgit/lwip.git\">https://cgit.git.savannah.gnu.org/cgit/lwip.git</a>. The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec."}]}], "credits": [{"lang": "en", "value": "Eric Evenchick of Tetrel Security reported this vulnerability to CISA.", "type": "finder"}], "source": {"advisory": "ICSA-26-265-02", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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{"created": "2026-09-22T21:30:20.112458+00:00", "updated": "2026-09-22T21:30:20.112463+00:00", "vendors": []}