New libpng packages are available for Slackware 14.2 and -current to fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/libpng-1.6.37-i586-1_slack14.2.txz: Upgraded.
This update fixes security issues:
Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free.
Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette.
Fixed a memory leak in pngtest.c.
Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in
contrib/pngminus; refactor.
For more information, see:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14048
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14550
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7317
(* Security fix *)
+--------------------------+


Where to find the new packages:
+-----------------------------+

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating FTP and rsync hosting
to the Slackware project!

Also see the "Get Slack" section on http://slackware.com for
additional mirror sites near you.

Updated package for Slackware 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/libpng-1.6.37-i586-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/libpng-1.6.37-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libpng-1.6.37-i586-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libpng-1.6.37-x86_64-1.txz


MD5 signatures:
+-------------+

Slackware 14.2 package:
829f6c020ad10fe9b09e94bceb7fae26 libpng-1.6.37-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
e141813a42551a3c31df15b8495dc1a3 libpng-1.6.37-x86_64-1_slack14.2.txz

Slackware -current package:
0f711d15bd85893a02f398b95b7d3f06 l/libpng-1.6.37-i586-1.txz

Slackware x86_64 -current package:
d8bdd5c1a73fa487c5f1a1a4b3ec2f63 l/libpng-1.6.37-x86_64-1.txz


Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg libpng-1.6.37-i586-1_slack14.2.txz


+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key
security@slackware.com

  Libpng (SSA:2019-107-01) Update for openSUSE