Home / mailings [slackware-security] xorg-server (SSA:2026-104-02)
Posted on 15 April 2026
Slackware Security[slackware-security] xorg-server (SSA:2026-104-02)
New xorg-server 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/xorg-server-1.20.14-i586-19_slack15.0.txz: Rebuilt.
This update fixes security issues:
XKB Integer Underflow in XkbSetCompatMap().
XKB Out-of-bounds Read in CheckSetGeom().
XSYNC Use-after-free in miSyncTriggerFence().
XKB Out-of-bounds read in CheckModifierMap().
XKB Buffer overflow in CheckKeyTypes().
For more information, see:
https://lists.x.org/archives/xorg-devel/2026-April/059446.html
https://www.cve.org/CVERecord?id=CVE-2026-33999
https://www.cve.org/CVERecord?id=CVE-2026-34000
https://www.cve.org/CVERecord?id=CVE-2026-34001
https://www.cve.org/CVERecord?id=CVE-2026-34002
https://www.cve.org/CVERecord?id=CVE-2026-34003
(* Security fix *)
patches/packages/xorg-server-xephyr-1.20.14-i586-19_slack15.0.txz: Rebuilt.
patches/packages/xorg-server-xnest-1.20.14-i586-19_slack15.0.txz: Rebuilt.
patches/packages/xorg-server-xvfb-1.20.14-i586-19_slack15.0.txz: Rebuilt.
patches/packages/xorg-server-xwayland-21.1.4-i586-17_slack15.0.txz: Rebuilt.
This update fixes security issues:
XKB Integer Underflow in XkbSetCompatMap().
XKB Out-of-bounds Read in CheckSetGeom().
XSYNC Use-after-free in miSyncTriggerFence().
XKB Out-of-bounds read in CheckModifierMap().
XKB Buffer overflow in CheckKeyTypes().
For more information, see:
https://lists.x.org/archives/xorg-devel/2026-April/059446.html
https://www.cve.org/CVERecord?id=CVE-2026-33999
https://www.cve.org/CVERecord?id=CVE-2026-34000
https://www.cve.org/CVERecord?id=CVE-2026-34001
https://www.cve.org/CVERecord?id=CVE-2026-34002
https://www.cve.org/CVERecord?id=CVE-2026-34003
(* 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 packages for Slackware 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/xorg-server-1.20.14-i586-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/xorg-server-xephyr-1.20.14-i586-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/xorg-server-xnest-1.20.14-i586-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/xorg-server-xvfb-1.20.14-i586-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/xorg-server-xwayland-21.1.4-i586-17_slack15.0.txz
Updated packages for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/xorg-server-1.20.14-x86_64-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/xorg-server-xephyr-1.20.14-x86_64-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/xorg-server-xnest-1.20.14-x86_64-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/xorg-server-xvfb-1.20.14-x86_64-19_slack15.0.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/xorg-server-xwayland-21.1.4-x86_64-17_slack15.0.txz
Updated packages for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/xorg-server-21.1.22-i686-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/xorg-server-xephyr-21.1.22-i686-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/xorg-server-xnest-21.1.22-i686-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/xorg-server-xvfb-21.1.22-i686-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/xorg-server-xwayland-24.1.10-i686-1.txz
Updated packages for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/xorg-server-21.1.22-x86_64-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/xorg-server-xephyr-21.1.22-x86_64-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/xorg-server-xnest-21.1.22-x86_64-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/xorg-server-xvfb-21.1.22-x86_64-1.txz
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/xorg-server-xwayland-24.1.10-x86_64-1.txz
MD5 signatures:
+-------------+
Slackware 15.0 packages:
9935c5c229bcab4edc593b3431158d3f xorg-server-1.20.14-i586-19_slack15.0.txz
d626cec0003c688e9ddd8a4354be3865 xorg-server-xephyr-1.20.14-i586-19_slack15.0.txz
1a9f2c1f92980b59a4ad432165e8bb99 xorg-server-xnest-1.20.14-i586-19_slack15.0.txz
28d25dc6926c2acb01bf5fdb13d62b4c xorg-server-xvfb-1.20.14-i586-19_slack15.0.txz
77e1c32e47857c1613c389317301d9e4 xorg-server-xwayland-21.1.4-i586-17_slack15.0.txz
Slackware x86_64 15.0 packages:
c4762ba3ba5f3f9a65009eeafb366384 xorg-server-1.20.14-x86_64-19_slack15.0.txz
5156374045dd79e29dc9f2abb619a2af xorg-server-xephyr-1.20.14-x86_64-19_slack15.0.txz
20bf03c1c7f694b57325d5523d0ddf4b xorg-server-xnest-1.20.14-x86_64-19_slack15.0.txz
40b9de889ed24fa4c0822aaf72c29d6e xorg-server-xvfb-1.20.14-x86_64-19_slack15.0.txz
3b14892335fb83ec4ad96aa3b0295c23 xorg-server-xwayland-21.1.4-x86_64-17_slack15.0.txz
Slackware -current packages:
6026945c1c8b8e462c5005669c54abd8 x/xorg-server-21.1.22-i686-1.txz
462cb1dba3886f17add9c48b037d766a x/xorg-server-xephyr-21.1.22-i686-1.txz
c6adf21ce90ee79deae79a5ee42dc94b x/xorg-server-xnest-21.1.22-i686-1.txz
0d30f26e236abc661ad635c359dbeb9e x/xorg-server-xvfb-21.1.22-i686-1.txz
6b721a355c506a7e191c3ee7e35d1e4c x/xorg-server-xwayland-24.1.10-i686-1.txz
Slackware x86_64 -current packages:
dae7283da10ba622614a29e7465a1fe1 x/xorg-server-21.1.22-x86_64-1.txz
f538e1758ace5335e096be3e4c65b6bc x/xorg-server-xephyr-21.1.22-x86_64-1.txz
27f831896e9cd7ff83a7d4a7fccaf56e x/xorg-server-xnest-21.1.22-x86_64-1.txz
05ca6daa0237d8e1cfc86a30824d25b7 x/xorg-server-xvfb-21.1.22-x86_64-1.txz
d7c57ad4679456a029d2e0563dff5b5c x/xorg-server-xwayland-24.1.10-x86_64-1.txz
Installation instructions:
+------------------------+
Upgrade the packages as root:
# upgradepkg xorg-server-*.txz
+-----+
Slackware Linux Security Team
http://slackware.com/gpg-key
security@slackware.com
