Fixed packages 23
| Release | Package | Fixed in |
|---|---|---|
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-common | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-debugsource | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xdmx | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xdmx-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xephyr | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xephyr-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xnest | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xnest-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xorg | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xorg-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xvfb | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::appstream | xorg-x11-server-Xvfb-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-debugsource | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-devel | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-source | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-Xdmx-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-Xephyr-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-Xnest-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-Xorg-debuginfo | 0:1.20.11-28.el8_10.3 |
| Red Hat · RHEL 8 enterprise_linux:8::crb | xorg-x11-server-Xvfb-debuginfo | 0:1.20.11-28.el8_10.3 |
Vulnerabilities 1
-
High 8.5
xorg-server / xwayland glamor font atlas Heap Buffer Overflow
Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a heap buffer overflow via SetFont due to missing glyph boundary checks.
References
-
article
https://access.redhat.com/security/updates/classification/#important
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2496165
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advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_38487.json
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report
https://access.redhat.com/security/cve/CVE-2026-55999
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advisory
https://www.cve.org/CVERecord?id=CVE-2026-55999
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advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-55999