CVE-2021-3998

high

Description

A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.

References

https://www.openwall.com/lists/oss-security/2022/01/24/4

https://sourceware.org/bugzilla/show_bug.cgi?id=28770

https://security.netapp.com/advisory/ntap-20221020-0003/

https://security-tracker.debian.org/tracker/CVE-2021-3998

https://bugzilla.redhat.com/show_bug.cgi?id=2024633

https://access.redhat.com/security/cve/CVE-2021-3998

https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report

https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=ee8d5e33adb284601c00c94687bc907e10aec9bb

https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=84d2d0fe20bdf94feed82b21b4d7d136db471f03

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-27188

https://cert-portal.siemens.com/productcert/html/ssa-831302.html

https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Details

Source: Mitre, NVD

Published: 2022-08-24

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N