Slackware Linux Security Team released updated tigervnc packages for Slackware 15.0 and the -current branch to patch two critical vulnerabilities in the Xorg server components. The fixes address a heap buffer overflow in the glamor Font Atlas and a use-after-free error during CommonMakeCurrent operations.

tigervnc (SSA:2026-190-01)

tigervnc (SSA:2026-190-01)

tigervnc (SSA:2026-190-01)

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

Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
extra/tigervnc/tigervnc-1.16.2-i586-4_slack15.0.txz: Rebuilt.
Recompiled against xorg-server-1.20.14, including patches for
security issues:
glamor Font Atlas Heap Buffer Overflow.
GLX contextTags Use-After-Free in CommonMakeCurrent().
For more information, see:
https://lists.x.org/archives/xorg/2026-July/062255.html
https://www.cve.org/CVERecord?id=CVE-2026-55999
https://www.cve.org/CVERecord?id=CVE-2026-56000
(* 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/extra/tigervnc/tigervnc-1.16.2-i586-4_slack15.0.txz

Updated package for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/extra/tigervnc/tigervnc-1.16.2-x86_64-4_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/extra/tigervnc/tigervnc-1.16.2-i686-5.txz

Updated packages for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/extra/tigervnc/tigervnc-1.16.2-x86_64-5.txz

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

Slackware 15.0 package:
e91b4d85ebcff2b70ba7e40c0a229a6c tigervnc-1.16.2-i586-4_slack15.0.txz

Slackware x86_64 15.0 package:
2c7277f1e3e7cd9236880f7ecc6f8f3c tigervnc-1.16.2-x86_64-4_slack15.0.txz

Slackware -current package:
3c62c5ea413d4c3117d8a46d1a538591 tigervnc-1.16.2-i686-5.txz

Slackware x86_64 -current package:
5800715ba19bff2691bed15edeb3fbbb tigervnc-1.16.2-x86_64-5.txz

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

Upgrade the package as root:
# upgradepkg tigervnc-1.16.2-i586-4_slack15.0.txz

+-----+

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