CVE-2026-112062mediumCWE-121

CVE-2026-112062: medium-severity vulnerability in lwIP

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

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6epss 0.4%
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.
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
Affected products
lwIP · lwIP
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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