Xorg-X11-Server Security Update — AlmaLinux 9 (ALSA-2026:38486)
This is a security release for AlmaLinux 9. The fix ships in the current release line (referenced builds: 20.11-34). Update the product on every affected server to the patched release — there is no workaround, and unpatched servers remain exposed until updated.
Fix-Befehle
EL8+ (AlmaLinux/CloudLinux/Rocky)
sudo dnf updateWas das unter einer SharedLicense-Lizenz bedeutet
Your SharedLicense license itself is not affected — this is a change in AlmaLinux 9 software, not in licensing. Update the product through its standard update channel. Licenses keep working through updates; nothing needs re-issuing or re-activating.
X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.
Security Fix(es):
* xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)
For more details about the secur…
Type:
security
Severity:
important
Release date:
2026-07-14
Description:
X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.
Security Fix(es):
* xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References:
Updated packages listed below:
| Architecture | Package | Checksum |
| aarch64 | xorg-x11-server-Xephyr-1.20.11-34.el9_8.3.aarch64.rpm | 3112a589fb07117e0632e1280b951ea313ac7b3c461b1d852932ca7a46de6430 |
| aarch64 | xorg-x11-server-common-1.20.11-34.el9_8.3.aarch64.rpm | 3410bccd65604484bda4ec24e7aff4fd8c2152e344445c9d1c72afa0393ab16a |
| aarch64 | xorg-x11-server-Xnest-1.20.11-34.el9_8.3.aarch64.rpm | 4ecde60b2149c7936af9caa4a73281fb7bc70f990e285652cd8e82fb4b488c72 |
| aarch64 | xorg-x11-server-Xdmx-1.20.11-34.el9_8.3.aarch64.rpm | 5e050177f2b3fcbce81aeb70eb9b8003ee2fa94709daaed913b9896ba999aae0 |
| aarch64 | xorg-x11-server-Xvfb-1.20.11-34.el9_8.3.aarch64.rpm | 70eeed3a70f6c2c888932489947fcde04e06344d10f70fdccc98dc55d40cccab |
| aarch64 | xorg-x11-server-devel-1.20.11-34.el9_8.3.aarch64.rpm | 7d62bd940b44a8fc3ec71518d4973ec7c532ccfc8efbbb3377b0f182328d725d |
| aarch64 | xorg-x11-server-Xorg-1.20.11-34.el9_8.3.aarch64.rpm | f5bba53d03723b2131935649907a54e57b669d9df54504cc94d001b1bcaf1e3a |
| i686 | xorg-x11-server-devel-1.20.11-34.el9_8.3.i686.rpm | ad3194069c6e7a1823d1d69715314eb9e01aa069b510161e15699a53ff2311ea |
| noarch | xorg-x11-server-source-1.20.11-34.el9_8.3.noarch.rpm | 48499a138a6f93c1ab1264a01a39bb13c0536e0479c9928d112ae873477ec932 |
| ppc64le | xorg-x11-server-Xnest-1.20.11-34.el9_8.3.ppc64le.rpm | 1f1b91d4af9390a8fa8c1fb61372b110fa751f7a6857eb82b83cf950f4b69cb7 |
| ppc64le | xorg-x11-server-Xvfb-1.20.11-34.el9_8.3.ppc64le.rpm | 3d7b99c37d4bb9fcb6cb587b1c4326167b626bcad8b3f9a221d409c936cd74ee |
| ppc64le | xorg-x11-server-Xdmx-1.20.11-34.el9_8.3.ppc64le.rpm | 3f5774f2e2dec836bb220b9d51169a21dd76f3255ba018860a0da412439baf18 |
| ppc64le | xorg-x11-server-Xephyr-1.20.11-34.el9_8.3.ppc64le.rpm | 82df36d9887482b1a72ef5cd141d0b3c9e7bd42fd8223b458f24fdc87b492a2d |
| ppc64le | xorg-x11-server-Xorg-1.20.11-34.el9_8.3.ppc64le.rpm | ca6685c65aad9a90a76a7a845fa0343337f59cd0f3339c37698ac5b0daaa7d87 |
| ppc64le | xorg-x11-server-common-1.20.11-34.el9_8.3.ppc64le.rpm | d4168feaeeabe6ed0fb54a8036ab2b550b39b58f275120abc1f6e724491418ea |
| ppc64le | xorg-x11-server-devel-1.20.11-34.el9_8.3.ppc64le.rpm | e0611eaa793eda4d10f6bed868d16695e84f6883cc0f89639841590b9d9699fd |
| s390x | xorg-x11-server-Xvfb-1.20.11-34.el9_8.3.s390x.rpm | 64ecd20679fee8bcb9de33ba21e84c06c53e74825e1d991934f0ddd2239e3a0d |
| s390x | xorg-x11-server-Xorg-1.20.11-34.el9_8.3.s390x.rpm | 785c87c8220ca9850c816030802159b369bef4a76c8fcafb35e9ccfccbf5bfee |
| s390x | xorg-x11-server-common-1.20.11-34.el9_8.3.s390x.rpm | 9cdb84ad57fc7b771d427dbcec3b098d90c2fd204ad844afed5c22bd7cf21e4e |
| s390x | xorg-x11-server-Xnest-1.20.11-34.el9_8.3.s390x.rpm | aa5022adcb45dbf9dcc081935a7f05ca11e5a099d501f16eeb5974de48c2929d |
| s390x | xorg-x11-server-Xdmx-1.20.11-34.el9_8.3.s390x.rpm | ada4f29b21afaa5438d859cc69f190cbe151e98cedf37d6026ecbb4c82018db5 |
| s390x | xorg-x11-server-Xephyr-1.20.11-34.el9_8.3.s390x.rpm | e97ae3a28b3c82aef9f26cb4a0abf6282894dcbe448e56f9694a77f95b9a46f6 |
| s390x | xorg-x11-server-devel-1.20.11-34.el9_8.3.s390x.rpm | facc020114b01c2ea7c54942ebe9ae392522ec0612a57c923ec5645e3e7f425c |
| x86_64 | xorg-x11-server-Xnest-1.20.11-34.el9_8.3.x86_64.rpm | 1d3a9450944d547914d8109bafac818d1ea11dd44712c2aaee4f59df29bdd8ee |
| x86_64 | xorg-x11-server-devel-1.20.11-34.el9_8.3.x86_64.rpm | 59173bc9c8210d8b9051e075f99cda8aa73032e6f9dfce1d4aec834086c7d743 |
| x86_64 | xorg-x11-server-Xorg-1.20.11-34.el9_8.3.x86_64.rpm | 82b9d26d1a9d3681831813b3a90b00ba775207089fa3c6c620819421de8ebcd1 |
| x86_64 | xorg-x11-server-Xdmx-1.20.11-34.el9_8.3.x86_64.rpm | 876df8d2343f806db798a49e176aa752b8ac890a22d4a1ed8afaf5f0787b4277 |
| x86_64 | xorg-x11-server-Xephyr-1.20.11-34.el9_8.3.x86_64.rpm | a878faa2f3dbda0cf0f9680df1d18e430806f643dc2c7a1727132658146e9007 |
| x86_64 | xorg-x11-server-common-1.20.11-34.el9_8.3.x86_64.rpm | b92c5b02828b4877aa9a0fda14d14f091feb3d0d9019b279e5fd2675983a506f |
| x86_64 | xorg-x11-server-Xvfb-1.20.11-34.el9_8.3.x86_64.rpm | f1be7923ddeafef69c9db661c2d0d69c75097540db353f28540ba64ccf547d4a |
Notes:
This page is generated automatically from Red Hat security data and has not been checked for errors. For clarification or corrections please contact the AlmaLinux Packaging Team.
Referenzen
Sicherheitshinweise
Verwandte Warnhinweise
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