CVE-2026-112062

lwIP through 2.2.1 Stack Out-of-Bounds Write via mDNS Search Response Handler

Published Oct 18, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 19, 2026, 5:56 PM
Reserved
Oct 18, 2026, 12:00 PM
Status
Awaiting Analysis
Published
Oct 18, 2026, 1:16 PM
Modified
Oct 19, 2026, 9:13 PM