CVE-2026-91018CWE-415

CVE-2026-91018

High · published September 23, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
14.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00241 · 14.3th percentile
Weakness
CWE-415 · Double Free
Published
2026-09-23T01:17Z
References (3)
https://cgit.git.savannah.gnu.org/cgit/lwip.git · [email protected]https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json · [email protected]https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02 · [email protected]
EPSS history
Timeline
  • 24 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 22 SEP 20:25Z
    Double Free in lwIP (lightweight IP)
    cvelistv5