Vulnerability DatabaseCVE-2026-112062
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CVE-2026-112062
Published:October 18, 2026
Updated:October 19, 2026
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.
Related Resources (5)
https://www.vulncheck.com/advisories/lwip-through-2.2.1-stack-out-of-bounds-write-via-mdns-search-response-handler
https://hackmd.io/@haindpwn/lwip-mdns-search-result-domain-oob-write
https://hackmd.io/@haindpwn/cve-2026-112062-lwip-mdns-search-result-domain-oob-write
https://github.com/lwip-tcpip/lwip/commit/ab2f69c7d8980c01cdd67ed4b23ac61118ed0205
https://github.com/lwip-tcpip/lwip/blob/STABLE-2_2_1_RELEASE/src/apps/mdns/mdns.c
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CVSS v4
Base Score:
6
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Stack-based Buffer Overflow
CWE-121
EPSS
Base Score:
0.22