Vulnerability 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.
CVSS Score
8.8
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Related Weaknesses (CWE)
References
- https://cgit.git.savannah.gnu.org/cgit/lwip.git
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-26
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02
FAQ
What is CVE-2026-91018?
CVE-2026-91018 is a vulnerability with a CVSS score of 8.8 (HIGH). 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.
How severe is CVE-2026-91018?
CVE-2026-91018 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-91018?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.