TI-2021-14397 Aliases CVE-2021-35942 GHSA-53wq-r63f-m33q

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read…

MEDIUM 50CWE-704Published 2021-07-22 · Updated 2026-10-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · None · High
Fix status: Partial Red Hat: 3 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.02753 86th percentileScored 2026-11-07

Fix Partial Red Hat: 1 advisoryRed Hat: 3 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPE	Versions	Role	Vendor
cpe:2.3:a:gnu:glibc::::::::	before 2.31	Vulnerable	GNU
cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::	not specified by NVD	Vulnerable	NetApp
cpe:2.3:a:netapp:e-series_santricity_os_controller::::::::	11.0 – 11.70.1	Vulnerable	NetApp
cpe:2.3:a:netapp:hci_management_node:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:a:netapp:solidfire:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:o:debian:debian_linux:10.0:::::::*	10.0	Vulnerable	Debian

cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* Versions before 2.31 Vulnerable ·GNU
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* Versions 11.0 – 11.70.1 Vulnerable ·NetApp
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

Red Hat 1 advisory

RHSA-2021:4358 Released 2021-11-09 · Red Hat rating Moderate
glibc security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) glibc-benchtests-2.28-164.el8, glibc-nss-devel-2.28-164.el8, glibc-static-2.28-164.el8 +1
- Red Hat Enterprise Linux AppStream (v. 8) compat-libpthread-nonshared-2.28-164.el8, glibc-utils-2.28-164.el8
- Red Hat Enterprise Linux BaseOS (v. 8) glibc-2.28-164.el8, glibc-all-langpacks-2.28-164.el8, glibc-common-2.28-164.el8 +47

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)	Fixed	RHSA-2021:4358
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2021:4358
Red Hat Enterprise Linux BaseOS (v. 8)	Fixed	RHSA-2021:4358

Not affected: 1 product

Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2021-35942
2026-10-03 Alias added: GHSA-53wq-r63f-m33q

References

Advisory 4

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences