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.
Published: 2026-09-22
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Users of lwIP are encouraged to update their version of lwIP using the repository found at  https://cgit.git.savannah.gnu.org/cgit/lwip.git . The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec.

Tracking

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Advisories

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History

Wed, 23 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Lwip
Lwip lwip
Vendors & Products Lwip
Lwip lwip

Tue, 22 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Double Free in lwIP (lightweight IP)
Weaknesses CWE-415
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: icscert

Published:

Updated: 2026-09-23T13:05:15.963Z

Reserved: 2026-09-14T16:40:45.500Z

Link: CVE-2026-91018

cve-icon Vulnrichment

Updated: 2026-09-23T13:03:25.938Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-22T21:17:33.290

Modified: 2026-09-23T19:42:48.540

Link: CVE-2026-91018

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T09:00:10Z

Weaknesses