A curl packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.

slackware-security: curl (SSA:2021-258-01)

[slackware-security] curl (SSA:2021-258-01)

New curl packages are available for Slackware 14.0, 14.1, 14.2, and -current to
fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/curl-7.79.0-i586-1_slack14.2.txz: Upgraded.
This update fixes security issues:
clear the leftovers pointer when sending succeeds.
do not ignore --ssl-reqd.
reject STARTTLS server response pipelining.
For more information, see:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22945
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22946
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22947
(* 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/curl-7.79.0-i486-1_slack14.0.txz

Updated package for Slackware x86_64 14.0:
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/curl-7.79.0-x86_64-1_slack14.0.txz

Updated package for Slackware 14.1:
  ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/curl-7.79.0-i486-1_slack14.1.txz

Updated package for Slackware x86_64 14.1:
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/curl-7.79.0-x86_64-1_slack14.1.txz

Updated package for Slackware 14.2:
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/curl-7.79.0-i586-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/curl-7.79.0-x86_64-1_slack14.2.txz

Updated package for Slackware -current:
  ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/curl-7.79.0-i586-1.txz

Updated package for Slackware x86_64 -current:
  ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/curl-7.79.0-x86_64-1.txz

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

Slackware 14.0 package:
a311694304f739d807ec1c3f1e1be430 curl-7.79.0-i486-1_slack14.0.txz

Slackware x86_64 14.0 package:
131de90d080e29b34397a7fdb323e763 curl-7.79.0-x86_64-1_slack14.0.txz

Slackware 14.1 package:
f1e61ff5609bf1e9abfd0a6d0130b115 curl-7.79.0-i486-1_slack14.1.txz

Slackware x86_64 14.1 package:
61cd3800c0f47a45b63553edcc1efe59 curl-7.79.0-x86_64-1_slack14.1.txz

Slackware 14.2 package:
ed6337cdae711195c4068162041dae80 curl-7.79.0-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
8fc49031584a53e35f85b32bf3726e00 curl-7.79.0-x86_64-1_slack14.2.txz

Slackware -current package:
661f22d3b107a2a1f7936b3c19597fe0 n/curl-7.79.0-i586-1.txz

Slackware x86_64 -current package:
cede4ac1b79cc400c7f4112fff5d69d6 n/curl-7.79.0-x86_64-1.txz

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

Upgrade the package as root:
# upgradepkg curl-7.79.0-i586-1_slack14.2.txz