CVE catalog

CVE-2021-31872

klibc: CVE-2021-31872

Severity: Medium
Published: Apr 30, 2021, 6:15:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 2.08% · Oct 25, 2026

An issue was discovered in klibc before 2.0.9. Multiple possible integer overflows in the cpio command on 32-bit systems may result in a buffer overflow or other security impact.

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	klibc	sid	`2.0.14-1`	fixed
Debian	klibc	forky	`2.0.14-1`	fixed
Debian	klibc	trixie	`2.0.14-1`	fixed
Debian	klibc	bookworm	`2.0.12-1`	fixed
Ubuntu	klibc	pro	`2.0.3-0ubuntu1`	vulnerable
Ubuntu	klibc	pro	`2.0.4-4`	vulnerable
Ubuntu	klibc	pro	`2.0.4-6`	vulnerable
Ubuntu	klibc	pro	`2.0.4-7`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8ubuntu1`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8ubuntu1.16.04.1`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8ubuntu1.16.04.2`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8ubuntu1.16.04.3`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8ubuntu1.16.04.4`	vulnerable
Ubuntu	klibc	pro	`2.0.4-8ubuntu1.16.04.4+esm1`	fixed
Ubuntu	klibc	18.04	`2.0.4-9ubuntu1`	vulnerable
Ubuntu	klibc	18.04	`2.0.4-9ubuntu2`	vulnerable
Ubuntu	klibc	18.04	`2.0.4-9ubuntu2.1`	fixed
Ubuntu	klibc	20.04	`2.0.6-1ubuntu1`	vulnerable
Ubuntu	klibc	20.04	`2.0.6-1ubuntu2`	vulnerable
Ubuntu	klibc	20.04	`2.0.7-1ubuntu1`	vulnerable
Ubuntu	klibc	20.04	`2.0.7-1ubuntu3`	vulnerable
Ubuntu	klibc	20.04	`2.0.7-1ubuntu4`	vulnerable
Ubuntu	klibc	20.04	`2.0.7-1ubuntu5`	vulnerable
Ubuntu	klibc	20.04	`2.0.7-1ubuntu5.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	klibc	source	sid	`2.0.8-6`	not yet assigned	Not reported	[989505]
Debian	klibc	source	forky	`2.0.8-6`	not yet assigned	Not reported	[989505]
Debian	klibc	source	trixie	`2.0.8-6`	not yet assigned	Not reported	[989505]
Debian	klibc	source	bookworm	`2.0.8-6`	not yet assigned	Not reported	[989505]
Ubuntu	klibc	deb	pro	`2.0.4-8ubuntu1.16.04.4+esm1`	Not reported	UBUNTU-CVE-2021-31872	Not reported
Ubuntu	klibc	deb	18.04	`2.0.4-9ubuntu2.1`	Not reported	UBUNTU-CVE-2021-31872	Not reported
Ubuntu	klibc	deb	20.04	`2.0.7-1ubuntu5.1`	Not reported	UBUNTU-CVE-2021-31872	Not reported

[Debian bug #989505]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[klibc-utils]Fixed
Source package: [klibc]
Details (2)
- 2.0.12-1 · amd64 · bookworm
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · bookworm; dsa · klibc · debian · 12
- 2.0.12-1 · arm64 · bookworm
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · bookworm; dsa · klibc · debian · 12
[libklibc]Fixed
Source package: [klibc]
Details (2)
- 2.0.12-1 · amd64 · bookworm
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · bookworm; dsa · klibc · debian · 12
- 2.0.12-1 · arm64 · bookworm
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · bookworm; dsa · klibc · debian · 12
[libklibc-dev]Fixed
Source package: [klibc]
Details (2)
- 2.0.12-1 · amd64 · bookworm
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · bookworm; dsa · klibc · debian · 12
- 2.0.12-1 · arm64 · bookworm
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · bookworm; dsa · klibc · debian · 12

[Debian 13 (Trixie)]

[klibc-utils]Fixed
Source package: [klibc]
Details (2)
- 2.0.14-1 · amd64 · trixie
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · 13
- 2.0.14-1 · arm64 · trixie
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · 13
[libklibc]Fixed
Source package: [klibc]
Details (2)
- 2.0.14-1 · amd64 · trixie
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · 13
- 2.0.14-1 · arm64 · trixie
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · 13
[libklibc-dev]Fixed
Source package: [klibc]
Details (2)
- 2.0.14-1 · amd64 · trixie
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · 13
- 2.0.14-1 · arm64 · trixie
  Fixed · Fixed: 2.0.8-6
  dsa · klibc · debian · 13

Observed: Oct 23, 2026, 5:56:58 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]