glibc-2.28-164.el8

The glibc packages provide the standard C libraries (libc), POSIX thread
libraries (libpthread), standard math libraries (libm), and the name service
cache daemon (nscd) used by multiple programs on the system. Without these
libraries, the Linux system cannot function correctly.

Security Fix(es):

* glibc: Arbitrary read in wordexp() (CVE-2021-35942)
* glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c
(CVE-2021-27645)
* glibc: mq_notify does not handle separately allocated thread attributes
(CVE-2021-33574)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s)
listed in the References section.

Additional Changes:
N/A

CVE-2021-27645
The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6)
2.29 through 2.33, when processing a request for netgroup lookup, may crash due
to a double-free, potentially resulting in degraded service or Denial of Service
on the local system. This is related to netgroupcache.c.
CVE-2021-33574
The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33
has a use-after-free. It may use the notification thread attributes object
(passed through its struct sigevent parameter) after it has been freed by the
caller, leading to a denial of service (application crash) or possibly
unspecified other impact.
CVE-2021-35942
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.