Description
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
Published: 2022-08-24
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3152-1 glibc security update
EUVD EUVD EUVD-2021-27189 A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
Ubuntu USN Ubuntu USN USN-5310-1 GNU C Library vulnerabilities
Ubuntu USN Ubuntu USN USN-5310-2 GNU C Library vulnerabilities
Ubuntu USN Ubuntu USN USN-6762-1 GNU C Library vulnerabilities
History

Tue, 02 Dec 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Subscriptions

Debian Debian Linux
Gnu Glibc
Netapp E-series Performance Analyzer H300s H300s Firmware H410c H410c Firmware H410s H410s Firmware H500s H500s Firmware H700s H700s Firmware Nfs Plug-in Ontap Select Deploy Administration Utility
Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-12-02T20:54:34.966Z

Reserved: 2021-11-22T00:00:00.000Z

Link: CVE-2021-3999

cve-icon Vulnrichment

Updated: 2024-08-03T17:16:03.318Z

cve-icon NVD

Status : Modified

Published: 2022-08-24T16:15:09.077

Modified: 2025-12-02T21:15:49.210

Link: CVE-2021-3999

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-01-11T00:00:00Z

Links: CVE-2021-3999 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses