{"id":"CVE-2026-91018","title":"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.","summary":"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.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-415"],"vendor":"lwIP","product":"lwIP API","affected":["api >= 2.0.1 <= 2.2.1"],"published":"2026-09-22","updated":"2026-09-22","sourceUpdated":"2026-09-22T21:17:33.290","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91018","references":[{"url":"https://cgit.git.savannah.gnu.org/cgit/lwip.git","label":"ics-cert@hq.dhs.gov"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json","label":"ics-cert@hq.dhs.gov"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02","label":"ics-cert@hq.dhs.gov"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-22T21:11:40.325Z","slug":"CVE-2026-91018","body":"## Overview\n\nlwIP (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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}