CVE catalog

CVE-2020-22284

lwIP vulnerabilities

Severity: Medium
Published: Jul 22, 2021, 8:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.18% · Oct 25, 2026

A buffer overflow vulnerability in the zepif_linkoutput() function of Free Software Foundation lwIP git head version and version 2.1.2 allows attackers to access sensitive information via a crafted 6LoWPAN packet.

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`	fixed
Debian	lwip	forky	`2.2.1+dfsg1-8`	fixed
Debian	lwip	trixie	`2.2.1+dfsg1-1+deb13u1`	fixed
Debian	lwip	bookworm	`2.1.3+dfsg1-2`	fixed
Ubuntu	lwip	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	fixed
Ubuntu	liblwip-dev	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	fixed
Ubuntu	liblwip-doc	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	fixed
Ubuntu	liblwip0t64	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	fixed
Ubuntu	lwip	pro	`2.1.2-3`	vulnerable
Ubuntu	lwip	pro	`2.1.2-5.1`	vulnerable
Ubuntu	lwip	pro	`2.1.2+dfsg1-1`	vulnerable
Ubuntu	lwip	pro	`2.1.2+dfsg1-4`	vulnerable
Ubuntu	lwip	pro	`2.1.2+dfsg1-4ubuntu0.1~esm1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	lwip	source	sid	`2.1.3+dfsg1-1`	not yet assigned	Not reported	[991646]
Debian	lwip	source	forky	`2.1.3+dfsg1-1`	not yet assigned	Not reported	[991646]
Debian	lwip	source	trixie	`2.1.3+dfsg1-1`	not yet assigned	Not reported	[991646]
Debian	lwip	source	bookworm	`2.1.3+dfsg1-1`	not yet assigned	Not reported	[991646]
Ubuntu	lwip	deb	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	liblwip-dev	deb	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	liblwip-doc	deb	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	liblwip0t64	deb	noble	`2.2.0+dfsg1-6.1ubuntu0.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	lwip	deb	pro	`2.1.2+dfsg1-4ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2020-22284	Not reported

[Debian bug #991646]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[liblwip0]Fixed
Source package: [lwip]
Details (2)
- 2.1.3+dfsg1-2 · amd64 · bookworm
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · bookworm; usn · lwip · debian · 12
- 2.1.3+dfsg1-2 · arm64 · bookworm
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · bookworm; usn · lwip · debian · 12
[liblwip-dev]Fixed
Source package: [lwip]
Details (2)
- 2.1.3+dfsg1-2 · amd64 · bookworm
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · bookworm; usn · lwip · debian · 12
- 2.1.3+dfsg1-2 · arm64 · bookworm
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · bookworm; usn · lwip · debian · 12
[liblwip-doc]Fixed
Source package: [lwip]
Details (2)
- 2.1.3+dfsg1-2 · all · bookworm
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · bookworm; usn · lwip · debian · 12
- 2.1.3+dfsg1-2 · all · bookworm
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · bookworm; usn · lwip · debian · 12

[Debian 13 (Trixie)]

[liblwip0t64]Fixed
Source package: [lwip]
Details (2)
- 2.2.1+dfsg1-1 · amd64 · trixie
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · 13
- 2.2.1+dfsg1-1 · arm64 · trixie
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · 13
[liblwip-dev]Fixed
Source package: [lwip]
Details (2)
- 2.2.1+dfsg1-1 · amd64 · trixie
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · 13
- 2.2.1+dfsg1-1 · arm64 · trixie
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · 13
[liblwip-doc]Fixed
Source package: [lwip]
Details (2)
- 2.2.1+dfsg1-1 · all · trixie
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · 13
- 2.2.1+dfsg1-1 · all · trixie
  Fixed · Fixed: 2.1.3+dfsg1-1
  usn · lwip · debian · 13

Observed: Oct 23, 2026, 5:49:07 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Ubuntu Security Notices (USN)]