[SECURITY] Fedora 27 Update: glibc-2.26-20.fc27

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Fedora Update Notification
FEDORA-2017-fb5e227432
2017-12-19 18:22:41.465710
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Name        : glibc
Product     : Fedora 27
Version     : 2.26
Release     : 20.fc27
URL         : http://www.gnu.org/software/glibc/
Summary     : The GNU libc libraries
Description :
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.

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Update Information:

This update fixes minor security bugs (CVE-2017-17426, CVE-2017-15804), contains
single-threaded optimizations for `malloc`, and increases compatibility with IBM
POWER 9 hardware.
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References:

  [ 1 ] Bug #1505298 - CVE-2017-15804 glibc: Buffer overflow during unescaping of user
names with the ~ operator
        https://bugzilla.redhat.com/show_bug.cgi?id=1505298
  [ 2 ] Bug #1524530 - CVE-2017-17426 glibc: Integer overflow with enabled tcache
        https://bugzilla.redhat.com/show_bug.cgi?id=1524530
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade glibc' at the command line.
For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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