New php packages are available for Slackware 14.0, 14.1, 14.2 to fix security issues. A bugfix release for -current is also available.

Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/php-5.6.40-i586-1_slack14.2.txz: Upgraded.
Several security bugs have been fixed in this release:
GD:
Fixed bug #77269 (efree() on uninitialized Heap data in imagescale leads
to use-after-free).
Fixed bug #77270 (imagecolormatch Out Of Bounds Write on Heap).
Mbstring:
Fixed bug #77370 (Buffer overflow on mb regex functions - fetch_token).
Fixed bug #77371 (heap buffer overflow in mb regex functions -
compile_string_node).
Fixed bug #77381 (heap buffer overflow in multibyte match_at).
Fixed bug #77382 (heap buffer overflow due to incorrect length in
expand_case_fold_string).
Fixed bug #77385 (buffer overflow in fetch_token).
Fixed bug #77394 (Buffer overflow in multibyte case folding - unicode).
Fixed bug #77418 (Heap overflow in utf32be_mbc_to_code).
Phar:
Fixed bug #77247 (heap buffer overflow in phar_detect_phar_fname_ext).
Xmlrpc:
Fixed bug #77242 (heap out of bounds read in xmlrpc_decode()).
Fixed bug #77380 (Global out of bounds read in xmlrpc base64 code).
For more information, see:
https://php.net/ChangeLog-5.php#5.6.40
(* 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 14.0:
ftp://ftp.slackware.com/pub/slackware/slackware-14.0/patches/packages/php-5.6.40-i486-1_slack14.0.txz

Updated package for Slackware x86_64 14.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/php-5.6.40-x86_64-1_slack14.0.txz

Updated package for Slackware 14.1:
ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/php-5.6.40-i486-1_slack14.1.txz

Updated package for Slackware x86_64 14.1:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/php-5.6.40-x86_64-1_slack14.1.txz

Updated package for Slackware 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/php-5.6.40-i586-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/php-5.6.40-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/php-7.2.15-i586-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/php-7.2.15-x86_64-1.txz


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

Slackware 14.0 package:
bcb848ec4441e1c9326b3a1db085505e php-5.6.40-i486-1_slack14.0.txz

Slackware x86_64 14.0 package:
9fc26fa58f2fb0ef5fb4cd7a8c1a213f php-5.6.40-x86_64-1_slack14.0.txz

Slackware 14.1 package:
9171862cf5c7f300f9647ca2a6ab473e php-5.6.40-i486-1_slack14.1.txz

Slackware x86_64 14.1 package:
eda09ba227a306b363e1ddfc33090e95 php-5.6.40-x86_64-1_slack14.1.txz

Slackware 14.2 package:
a09c980f8725eee8b7d6c5175431fe48 php-5.6.40-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
16e5126eb40d443847ce62f40acaa964 php-5.6.40-x86_64-1_slack14.2.txz

Slackware -current package:
9a839180fa5a37150e5c9a8d1bb090da n/php-7.2.15-i586-1.txz

Slackware x86_64 -current package:
384910100ad49d38f7dbb4fec532200e n/php-7.2.15-x86_64-1.txz


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

Upgrade the package as root:
# upgradepkg php-5.6.40-i586-1_slack14.2.txz

Then, restart Apache httpd:
# /etc/rc.d/rc.httpd stop
# /etc/rc.d/rc.httpd start

  PHP (SSA:2019-038-01) Update for Slackware