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[slackware-security] libpng (SSA:2026-099-01)

Posted on 10 April 2026
Slackware Security

[slackware-security] libpng (SSA:2026-099-01)

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


Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
patches/packages/libpng-1.6.57-i586-1_slack15.0.txz: Upgraded.
Fixed a medium severity security issue:
Use-after-free in `png_set_PLTE`, `png_set_tRNS` and `png_set_hIST`
leading to corrupted chunk data and potential heap information disclosure.
Also hardened the append-style setters (`png_set_text`, `png_set_sPLT`,
`png_set_unknown_chunks`) against a theoretical variant of the same
aliasing pattern.
For more information, see:
https://www.cve.org/CVERecord?id=CVE-2026-34757
(* 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-1.6.57-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-1.6.57-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libpng-1.6.57-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libpng-1.6.57-x86_64-1.txz


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

Slackware 15.0 package:
31ee3681a4e643fd2871cd18bf353c1d libpng-1.6.57-i586-1_slack15.0.txz

Slackware x86_64 15.0 package:
58103bf4878142d7cd45ffd3f64bdee5 libpng-1.6.57-x86_64-1_slack15.0.txz

Slackware -current package:
bcea1da0a9780feb0aa202122d5580b8 l/libpng-1.6.57-i686-1.txz

Slackware x86_64 -current package:
9219bce99534c8866a269ff72f7f3083 l/libpng-1.6.57-x86_64-1.txz


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

Upgrade the package as root:
# upgradepkg libpng-1.6.57-i586-1_slack15.0.txz


+-----+

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

 

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