{"id":"DEBIAN-CVE-2026-91018","details":"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.","modified":"2026-09-24T08:47:34.574223890Z","published":"2026-09-22T21:17:33.290Z","upstream":["CVE-2026-91018"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-91018"}],"affected":[{"package":{"name":"lwip","ecosystem":"Debian:12","purl":"pkg:deb/debian/lwip?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.3+dfsg1-2","2.1.3+dfsg1-3","2.1.3+dfsg1-4","2.2.0+dfsg1-1","2.2.0+dfsg1-2","2.2.0+dfsg1-3","2.2.0+dfsg1-4","2.2.0+dfsg1-5","2.2.0+dfsg1-6","2.2.0+dfsg1-6.1","2.2.0+dfsg1-6.1~exp1","2.2.0+dfsg1-7","2.2.0+dfsg1-8","2.2.0+dfsg1-9","2.2.1+dfsg1-1","2.2.1+dfsg1-2","2.2.1+dfsg1-3","2.2.1+dfsg1-4","2.2.1+dfsg1-5","2.2.1+dfsg1-6","2.2.1+dfsg1-7"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91018.json"}},{"package":{"name":"lwip","ecosystem":"Debian:13","purl":"pkg:deb/debian/lwip?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1+dfsg1-1","2.2.1+dfsg1-1+deb13u1","2.2.1+dfsg1-2","2.2.1+dfsg1-3","2.2.1+dfsg1-4","2.2.1+dfsg1-5","2.2.1+dfsg1-6","2.2.1+dfsg1-7"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91018.json"}},{"package":{"name":"lwip","ecosystem":"Debian:14","purl":"pkg:deb/debian/lwip?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1+dfsg1-1","2.2.1+dfsg1-2","2.2.1+dfsg1-3","2.2.1+dfsg1-4","2.2.1+dfsg1-5","2.2.1+dfsg1-6","2.2.1+dfsg1-7"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91018.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}