CVE-2026-112062

NameCVE-2026-112062
DescriptionlwIP 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
lwip (PTS)bookworm2.1.3+dfsg1-2vulnerable
trixie2.2.1+dfsg1-1+deb13u1vulnerable
forky, sid2.2.1+dfsg1-8vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
lwipsource(unstable)(unfixed)unimportant

Notes

Fixed by: https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=ab2f69c7d8980c01cdd67ed4b23ac61118ed0205
src/apps/mdns code not built in Debian binary packages

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