New acl packages are available for Slackware 11.0, 12.0, 12.1, 12.2, 13.0, 13.1, and -current to fix a security issue.

Here are the details from the Slackware 13.1 ChangeLog:
+--------------------------+
patches/packages/acl-2.2.50-i486-1_slack13.1.txz: Upgraded.
Fix the --physical option in setfacl and getfacl to prevent symlink attacks.
Thanks to Martijn Dekker for the notification.
For more information, see:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4411
(* Security fix *)
+--------------------------+


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

HINT: Getting slow download speeds from ftp.slackware.com?
Give slackware.osuosl.org a try. This is another primary FTP site
for Slackware that can be considerably faster than downloading
directly from ftp.slackware.com.

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating additional 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 11.0:
ftp://ftp.slackware.com/pub/slackware/slackware-11.0/patches/packages/acl-2.2.50-i486-1_slack11.0.tgz

Updated package for Slackware 12.0:
ftp://ftp.slackware.com/pub/slackware/slackware-12.0/patches/packages/acl-2.2.50-i486-1_slack12.0.tgz

Updated package for Slackware 12.1:
ftp://ftp.slackware.com/pub/slackware/slackware-12.1/patches/packages/acl-2.2.50-i486-1_slack12.1.tgz

Updated package for Slackware 12.2:
ftp://ftp.slackware.com/pub/slackware/slackware-12.2/patches/packages/acl-2.2.50-i486-1_slack12.2.tgz

Updated package for Slackware 13.0:
ftp://ftp.slackware.com/pub/slackware/slackware-13.0/patches/packages/acl-2.2.50-i486-1_slack13.0.txz

Updated package for Slackware x86_64 13.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-13.0/patches/packages/acl-2.2.50-x86_64-1_slack13.0.txz

Updated package for Slackware 13.1:
ftp://ftp.slackware.com/pub/slackware/slackware-13.1/patches/packages/acl-2.2.50-i486-1_slack13.1.txz

Updated package for Slackware x86_64 13.1:
ftp://ftp.slackware.com/pub/slackware/slackware64-13.1/patches/packages/acl-2.2.50-x86_64-1_slack13.1.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/a/acl-2.2.50-i486-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/a/acl-2.2.50-x86_64-1.txz


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

Slackware 11.0 package:
d30a67b28019f96cdb9fde78564b0338 acl-2.2.50-i486-1_slack11.0.tgz

Slackware 12.0 package:
fd3071de0015e36ce6dd15035d67a60a acl-2.2.50-i486-1_slack12.0.tgz

Slackware 12.1 package:
9775cc97f24ee94b62da02f44ee68a3a acl-2.2.50-i486-1_slack12.1.tgz

Slackware 12.2 package:
67add881c7cc12b47cddf60423d282bc acl-2.2.50-i486-1_slack12.2.tgz

Slackware 13.0 package:
dbef85a994c8c70332b8f3dce90cbf95 acl-2.2.50-i486-1_slack13.0.txz

Slackware x86_64 13.0 package:
28d74a221c8a4cbc6ab08205bbdde1f1 acl-2.2.50-x86_64-1_slack13.0.txz

Slackware 13.1 package:
11e21c1a878cbcf4bef85a37ba2ebc80 acl-2.2.50-i486-1_slack13.1.txz

Slackware x86_64 13.1 package:
37ae456acafd28ccec14ffee46c3b1da acl-2.2.50-x86_64-1_slack13.1.txz

Slackware -current package:
ceacbe4b1a09f595d8e446e7e13bf1e7 a/acl-2.2.50-i486-1.txz

Slackware x86_64 -current package:
0f2842fa027f90b3206888a65d001854 a/acl-2.2.50-x86_64-1.txz


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

Upgrade the package as root:
# upgradepkg acl-2.2.50-i486-1_slack13.1.txz


+-----+

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