A gd security update has been released for Slackware Linux to fix multiple bugs and security issues, including potential double-free in gdImage*Ptr(), gdImageColorMatch() out of bounds write on heap, uninitialized read in gdImageCreateFromXbm(), double-free in gdImageBmp, potential NULL pointer dereference in gdImageClone(), and potential infinite loop in gdImageCreateFromGifCtx().

New gd 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/gd-2.3.0-i586-1_slack14.2.txz: Upgraded.
This update fixes bugs and security issues:
Potential double-free in gdImage*Ptr().
gdImageColorMatch() out of bounds write on heap.
Uninitialized read in gdImageCreateFromXbm().
Double-free in gdImageBmp.
Potential NULL pointer dereference in gdImageClone().
Potential infinite loop in gdImageCreateFromGifCtx().
For more information, see:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6978
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6977
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11038
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000222
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14553
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5711
(* 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/gd-2.3.0-i586-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/gd-2.3.0-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/gd-2.3.0-i586-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/gd-2.3.0-x86_64-1.txz

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

Slackware 14.2 package:
02054b210ea398c39294503cfd96932a gd-2.3.0-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
b9de5217fd1c323ece6c42d59118f611 gd-2.3.0-x86_64-1_slack14.2.txz

Slackware -current package:
073b5aa2f29173ac3549a55fae397a78 l/gd-2.3.0-i586-1.txz

Slackware x86_64 -current package:
ada8d37a3346d51cf1b773c01cbca8ce l/gd-2.3.0-x86_64-1.txz

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

Upgrade the package as root:
# upgradepkg gd-2.3.0-i586-1_slack14.2.txz