CVE catalog

CVE-2021-35942

glibc: CVE-2021-35942

Severity: Critical · CVSS 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published: Jul 22, 2021, 6:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.75% · Oct 22, 2026

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

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	glibc	sid	`2.43-7`	fixed
Debian	glibc	forky	`2.43-7`	fixed
Debian	glibc	trixie	`2.41-12+deb13u4`	fixed
Debian	glibc	bookworm	`2.36-9+deb12u14`	fixed
Debian	glibc	bookworm-security	`2.36-9+deb12u7`	fixed
Cpe	glibc	Not reported	`2.31`	fixed
Cpe	active_iq_unified_manager	Not reported	Not reported	unknown
Cpe	e-series_santricity_os_controller	Not reported	Not reported	unknown
Cpe	hci_management_node	Not reported	Not reported	unknown
Cpe	ontap_select_deploy_administration_utility	Not reported	Not reported	unknown
Cpe	solidfire	Not reported	Not reported	unknown
Cpe	debian_linux	Not reported	Not reported	unknown
Ubuntu	eglibc	pro	`2.17-93ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu1`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.8`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.9`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.10`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.11`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.13`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.14`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm4`	vulnerable
Ubuntu	glibc	pro	`2.21-0ubuntu4`	vulnerable
Ubuntu	glibc	pro	`2.21-0ubuntu5`	vulnerable
Ubuntu	glibc	pro	`2.21-0ubuntu6`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu1`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu2`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu3`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu4`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu5`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu6`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu7`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu9`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu10`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu11`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu11.2`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu11.3`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu11.3+esm1`	vulnerable
Ubuntu	glibc	pro	`2.23-0ubuntu11.3+esm2`	fixed
Ubuntu	glibc	18.04	`2.26-0ubuntu2`	vulnerable
Ubuntu	glibc	18.04	`2.26-0ubuntu2.1`	vulnerable
Ubuntu	glibc	18.04	`2.27-0ubuntu2`	vulnerable
Ubuntu	glibc	18.04	`2.27-0ubuntu3`	vulnerable
Ubuntu	glibc	18.04	`2.27-3ubuntu1`	vulnerable
Ubuntu	glibc	18.04	`2.27-3ubuntu1.2`	vulnerable
Ubuntu	glibc	18.04	`2.27-3ubuntu1.3`	vulnerable
Ubuntu	glibc	18.04	`2.27-3ubuntu1.4`	vulnerable
Ubuntu	glibc	18.04	`2.27-3ubuntu1.5`	fixed
Ubuntu	glibc	20.04	`2.30-0ubuntu2`	vulnerable
Ubuntu	glibc	20.04	`2.30-0ubuntu3`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu5`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu6`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu7`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu9`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu9.1`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu9.2`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu9.3`	vulnerable
Ubuntu	glibc	20.04	`2.31-0ubuntu9.7`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	glibc	source	sid	`2.31-13`	not yet assigned	Not reported	[990542]
Debian	glibc	source	forky	`2.31-13`	not yet assigned	Not reported	[990542]
Debian	glibc	source	trixie	`2.31-13`	not yet assigned	Not reported	[990542]
Debian	glibc	source	bookworm	`2.31-13`	not yet assigned	Not reported	[990542]
Cpe	glibc	cpe	Not reported	`2.31`	Not reported	NVD-CVE-2021-35942	Not reported
Ubuntu	glibc	deb	pro	`2.23-0ubuntu11.3+esm2`	Not reported	UBUNTU-CVE-2021-35942	Not reported
Ubuntu	glibc	deb	18.04	`2.27-3ubuntu1.5`	Not reported	UBUNTU-CVE-2021-35942	Not reported
Ubuntu	glibc	deb	20.04	`2.31-0ubuntu9.7`	Not reported	UBUNTU-CVE-2021-35942	Not reported

[Debian bug #990542]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[glibc-doc]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[glibc-source]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6-dbg]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6-dev]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6-dev-i386]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6-dev-x32]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6-i386]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc6-x32]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc-bin]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc-dev-bin]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc-devtools]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[libc-l10n]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[locales]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[locales-all]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
[nscd]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.31-13
  dsa · glibc · debian · bookworm

Observed: Oct 23, 2026, 5:58:39 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]