CVE catalog

CVE-2026-112062

Severity: Medium · CVSS 6CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 18, 2026, 12:19:52 PM UTC
Updated: Oct 18, 2026, 1:16:38 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.36% · Oct 25, 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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	lwip	sid	`2.2.1+dfsg1-9`	vulnerable
Debian	lwip	forky	`2.2.1+dfsg1-8`	vulnerable
Debian	lwip	trixie	`2.2.1+dfsg1-1+deb13u1`	vulnerable
Debian	lwip	bookworm	`2.1.3+dfsg1-2`	vulnerable
Ubuntu	lwip	pro	`2.2.1+dfsg1-2`	vulnerable
Ubuntu	lwip	pro	`2.2.1+dfsg1-3`	vulnerable
Ubuntu	lwip	pro	`2.2.1+dfsg1-4`	vulnerable
Ubuntu	lwip	pro	`2.2.1+dfsg1-4ubuntu0.1~esm1`	vulnerable
Ubuntu	lwip	26.10	`2.2.1+dfsg1-4`	vulnerable
Ubuntu	lwip	26.10	`2.2.1+dfsg1-5`	vulnerable
Ubuntu	lwip	26.10	`2.2.1+dfsg1-7`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	lwip	source	sid	`(unfixed)`	unimportant	Not reported	Not reported
Debian	lwip	source	forky	`(unfixed)`	unimportant	Not reported	Not reported
Debian	lwip	source	trixie	`(unfixed)`	unimportant	Not reported	Not reported
Debian	lwip	source	bookworm	`(unfixed)`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[liblwip0]Affected
Source package: [lwip]
Details (2)
- 2.1.3+dfsg1-2 · amd64 · bookworm
  Affected
  nvd · lwip · debian · bookworm; nvd · lwip · debian · 12
- 2.1.3+dfsg1-2 · arm64 · bookworm
  Affected
  nvd · lwip · debian · bookworm; nvd · lwip · debian · 12
[liblwip-dev]Affected
Source package: [lwip]
Details (2)
- 2.1.3+dfsg1-2 · amd64 · bookworm
  Affected
  nvd · lwip · debian · bookworm; nvd · lwip · debian · 12
- 2.1.3+dfsg1-2 · arm64 · bookworm
  Affected
  nvd · lwip · debian · bookworm; nvd · lwip · debian · 12
[liblwip-doc]Affected
Source package: [lwip]
Details (2)
- 2.1.3+dfsg1-2 · all · bookworm
  Affected
  nvd · lwip · debian · bookworm; nvd · lwip · debian · 12
- 2.1.3+dfsg1-2 · all · bookworm
  Affected
  nvd · lwip · debian · bookworm; nvd · lwip · debian · 12

[Debian 13 (Trixie)]

[liblwip0t64]Affected
Source package: [lwip]
Details (2)
- 2.2.1+dfsg1-1 · amd64 · trixie
  Affected
  nvd · lwip · debian · 13
- 2.2.1+dfsg1-1 · arm64 · trixie
  Affected
  nvd · lwip · debian · 13
[liblwip-dev]Affected
Source package: [lwip]
Details (2)
- 2.2.1+dfsg1-1 · amd64 · trixie
  Affected
  nvd · lwip · debian · 13
- 2.2.1+dfsg1-1 · arm64 · trixie
  Affected
  nvd · lwip · debian · 13
[liblwip-doc]Affected
Source package: [lwip]
Details (2)
- 2.2.1+dfsg1-1 · all · trixie
  Affected
  nvd · lwip · debian · 13
- 2.2.1+dfsg1-1 · all · trixie
  Affected
  nvd · lwip · debian · 13

Observed: Oct 25, 2026, 2:49:40 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]