CVE-2021-3998

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.

Red Hat Enterprise Linux 6, 7, and 8 are not affected by this issue as they ship an older version of glibc which does not include the vulnerable code (i.e. realpath_stk() function does not exist). Red Hat Enterprise Linux 9 is not affected because this CVE was fixed at 9.0 GA so there is no impact for customers.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.