From: Slackware Security Team <security@slackware.com>
To: slackware-security@slackware.com
Subject: [slackware-security] libpng (SSA:2026-085-02)
Date: Thu, 26 Mar 2026 21:14:24 -0700 (PDT)





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[slackware-security] libpng (SSA:2026-085-02)

New libpng packages are available for Slackware 15.0 and -current to
fix security issues.


Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
patches/packages/libpng-1.6.56-i586-1_slack15.0.txz: Upgraded.
This update fixes security issues:
Use-after-free via pointer aliasing in png_set_tRNS and png_set_PLTE.
Out-of-bounds read/write in the palette expansion on ARM Neon.
For more information, see:
https://www.cve.org/CVERecord?id=CVE-2026-33416
https://www.cve.org/CVERecord?id=CVE-2026-33636
(* 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 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/libpng-1.6.56-i586-1_slack15.0.txz

Updated package for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/libpng-1.6.56-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libpng-1.6.56-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libpng-1.6.56-x86_64-1.txz


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

Slackware 15.0 package:
2e036f100e13c974643827a74c55ab5a libpng-1.6.56-i586-1_slack15.0.txz

Slackware x86_64 15.0 package:
b98998363184de799754fce3a269f8cb libpng-1.6.56-x86_64-1_slack15.0.txz

Slackware -current package:
eccb99e6b8fa649802c44466ebd8d7ed l/libpng-1.6.56-i686-1.txz

Slackware x86_64 -current package:
f579a18f2242eb3f4d27726593b6e676 l/libpng-1.6.56-x86_64-1.txz


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

Upgrade the package as root:
# upgradepkg libpng-1.6.56-i586-1_slack15.0.txz


+-----+

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

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