Description
lwIP through 2.2.1 contains a stack out-of-bounds write vulnerability in mdns_handle_response that allows adjacent attackers to corrupt stack memory by sending mDNS responses with invalid domain names. Attackers on the local link can send multicast PTR answers with oversized RDLENGTH or SRV answers with RDLENGTH below 6 during a service search, overflowing a 256-byte stack buffer and crashing the device.
Published: 2026-10-18
Score: 6 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sun, 18 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
Description lwIP through 2.2.1 contains a stack out-of-bounds write vulnerability in mdns_handle_response that allows adjacent attackers to corrupt stack memory by sending mDNS responses with invalid domain names. Attackers on the local link can send multicast PTR answers with oversized RDLENGTH or SRV answers with RDLENGTH below 6 during a service search, overflowing a 256-byte stack buffer and crashing the device.
Title lwIP through 2.2.1 Stack Out-of-Bounds Write via mDNS Search Response Handler
First Time appeared Lwip Project
Lwip Project lwip
Weaknesses CWE-121
CPEs cpe:2.3:a:lwip_project:lwip:*:*:*:*:*:*:*:*
Vendors & Products Lwip Project
Lwip Project lwip
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Lwip Project Lwip
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-18T12:19:52.023Z

Reserved: 2026-10-18T12:00:07.926Z

Link: CVE-2026-112062

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-18T13:16:38.750

Modified: 2026-10-18T13:16:38.750

Link: CVE-2026-112062

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses