Medium severity5.9NVD Advisory· Published Oct 18, 2026
CVE-2026-112062
CVE-2026-112062
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.
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Affected products
1- Range: <=2.2.1
Patches
Vulnerability mechanics
References
4- github.com/lwip-tcpip/lwip/blob/STABLE-2_2_1_RELEASE/src/apps/mdns/mdns.cnvd
- github.com/lwip-tcpip/lwip/commit/ab2f69c7d8980c01cdd67ed4b23ac61118ed0205nvd
- hackmd.io/@haindpwn/lwip-mdns-search-result-domain-oob-writenvd
- www.vulncheck.com/advisories/lwip-through-2.2.1-stack-out-of-bounds-write-via-mdns-search-response-handlernvd
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