CVE-2026-91018
highlwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim syst…
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
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (ics-cert@hq.dhs.gov)
Timeline (UTC)
Published: 2026-09-22 21:17
Modified: 2026-09-23 19:42
NVD status: Awaiting Analysis
Last synced 2 days ago
Verified against the source API 2026-10-27 06:55 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://cgit.git.savannah.gnu.org/cgit/lwip.git ics-cert@hq.dhs.gov
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json ics-cert@hq.dhs.gov
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02 ics-cert@hq.dhs.gov
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:55 UTC · record ↗