Fedora 33 FEDORA-2021-f29b4643c7 Moderate Glibc Use-After-Free

The glibc package contains standard libraries which are used by

multiple programs on the system. In order to save disk space and

memory, as well as to make upgrading easier, common system code is

kept in one place and shared between programs. This particular package

contains the most important sets of shared libraries: the standard C

library and the standard math library. Without these two libraries, a

Linux system will not function.

This `glibc` update re-enables `valgrind` suppression support for string

functions. It addresses `valgrind` false positives on the aarch64 architecture

in particular. ---- This glibc update fixes a use-after-free in the

`mq_notify` function (CVE-2021-33574).

* Mon Jun 21 2021 Florian Weimer - 2.32-8

- Add valgrind support symbols to libc.so.6's symtab (#1965374)

* Fri Jun 11 2021 Arjun Shankar - 2.32-7

- Auto-sync with upstream branch release/2.32/master,

commit 16949aeaa078b5994a333980d7a6cd5705d5e1f7:

- Fix use of __pthread_attr_copy in mq_notify (bug 27896)

- Use __pthread_attr_copy in mq_notify (bug 27896)

[ 1 ] Bug #1965374 - glibc: valgrind suppressions no longer active after debuginfo removal

https://bugzilla.redhat.com/show_bug.cgi?id=1965374

[ 2 ] Bug #1965410 - CVE-2021-33574 glibc: mq_notify does not handle separately allocated thread attributes [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1965410

su -c 'dnf upgrade --advisory FEDORA-2021-f29b4643c7' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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