The Slackware Linux Security Team issued new p11-kit and libXfont2 packages for Slackware 15.0 and -current under security advisory SSA:2026-218 to resolve critical vulnerabilities. The p11-kit upgrade to version 0.26.5 patches CVE-2026-18938 by preventing an overflow when the RPC layer decodes nested attributes. The libXfont2 release, version 2.0.9, addresses CVE-2026-59679 and CVE-2026-44950, which involve out-of-bounds read/write errors and a heap buffer overflow in Font Server Client glyph processing. Users should download the updated binaries for their architecture from the Slackware FTP servers and apply the changes using upgradepkg as root.

p11-kit (SSA:2026-218-02)
libXfont2 (SSA:2026-218-01)

p11-kit (SSA:2026-218-02)

p11-kit (SSA:2026-218-02)

New p11-kit 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/p11-kit-0.26.5-i586-1_slack15.0.txz: Upgraded.
This update fixes a security issue:
rpc: guard against overflow when decoding nested attributes.
For more information, see:
https://www.cve.org/CVERecord?id=CVE-2026-18938
(* 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/p11-kit-0.26.5-i586-1_slack15.0.txz

Updated package for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/p11-kit-0.26.5-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/p11-kit-0.26.5-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/p11-kit-0.26.5-x86_64-1.txz

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

Slackware 15.0 package:
a688d893589089bddcdaad3a218c8411 p11-kit-0.26.5-i586-1_slack15.0.txz

Slackware x86_64 15.0 package:
ad2edb0dd66af925ed532fdcfd9ff9c5 p11-kit-0.26.5-x86_64-1_slack15.0.txz

Slackware -current package:
a6eb83cede6a450f0d08c1cb16685784 n/p11-kit-0.26.5-i686-1.txz

Slackware x86_64 -current package:
22c55589f9966ff5bf8b1c3d319fa100 n/p11-kit-0.26.5-x86_64-1.txz

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

Upgrade the package as root:
# upgradepkg p11-kit-0.26.5-i586-1_slack15.0.txz

+-----+

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

libXfont2 (SSA:2026-218-01)

libXfont2 (SSA:2026-218-01)

New libXfont2 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/libXfont2-2.0.9-i586-1_slack15.0.txz: Upgraded.
This update fixes security issues:
Font Server Client encoding Out-Of-Bounds Read/Write.
Font Server Client Cumulative Glyph Data Heap Buffer Overflow.
For more information, see:
https://lists.x.org/archives/xorg/2026-August/062274.html
https://www.cve.org/CVERecord?id=CVE-2026-59679
https://www.cve.org/CVERecord?id=CVE-2026-44950
(* 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/libXfont2-2.0.9-i586-1_slack15.0.txz

Updated package for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/libXfont2-2.0.9-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/libXfont2-2.0.9-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/libXfont2-2.0.9-x86_64-1.txz

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

Slackware 15.0 package:
1e8b85f3f6f8697ae28db3db45a8162c libXfont2-2.0.9-i586-1_slack15.0.txz

Slackware x86_64 15.0 package:
6949f9f156c76b1ecc2a09205e790aad libXfont2-2.0.9-x86_64-1_slack15.0.txz

Slackware -current package:
9986b7fa639e4b983d0e71bf5c3ef21f x/libXfont2-2.0.9-i686-1.txz

Slackware x86_64 -current package:
aafad9dbd4949d043a7019eb8cf85a2e x/libXfont2-2.0.9-x86_64-1.txz

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

Upgrade the package as root:
# upgradepkg libXfont2-2.0.9-i586-1_slack15.0.txz

+-----+

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