VULNERABILITY INTELLIGENCE

CVE-2021-3999

CVSS score7.8 HIGH
EPSS probability0.81%
CISA KEVNot currently listed
Published2022-08-24
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-193
  • nvd@nist.gov: CWE-193

Primary references