CVE-2026-112062CWE-121

CVE-2026-112062

Medium · published October 18, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
13.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
CVSS v4.0
6.0 · 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
EPSS
0.00229 · 13.0th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-10-18T17:16Z
References (5)
https://github.com/lwip-tcpip/lwip/blob/STABLE-2_2_1_RELEASE/src/apps/mdns/mdns.c · [email protected]https://github.com/lwip-tcpip/lwip/commit/ab2f69c7d8980c01cdd67ed4b23ac61118ed0205 · [email protected]https://hackmd.io/@haindpwn/lwip-mdns-search-result-domain-oob-write · [email protected]https://www.vulncheck.com/advisories/lwip-through-2.2.1-stack-out-of-bounds-write-via-mdns-search-response-handler · [email protected]https://hackmd.io/@haindpwn/cve-2026-112062-lwip-mdns-search-result-domain-oob-write · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 20 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 18 OCT 12:19Z
    lwIP through 2.2.1 Stack Out-of-Bounds Write via mDNS Search Response Handler
    cvelistv5
  • 18 OCT 12:19Z
    lwIP through 2.2.1 Stack Out-of-Bounds Write via mDNS Search Response Handler
    cvelistv5