Oracle Linux: CVE-2021-35942: ELSA-2021-4358: glibc security, bug fix, and enhancement update (MODERATE) (Multiple Advisories)

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.
An integer overflow flaw was found in glibc that may result in reading of arbitrary memory when wordexp is used with a specially crafted untrusted regular expression input.