Linux · Security advisory · April 30, 2026
RHSA-2026:20563: xorg-x11-server-Xwayland security update
RHSA-2026:20563, released April 30, 2026, fixes 5 CVEs in xorg-x11-server-Xwayland (version 24.1.5-6.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
5
2 rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0049
42nd percentile
Priority of the 5 CVEs
Patch now 0
Urgent 2
High 3
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| xorg-x11-server-Xwayland | RHEL 10 | 24.1.5-6.el10_0 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-34000 | xorg-server: A flaw was found in the X.Org X server | 9.1 | 0.0049 | None reported | |
| Urgent | CVE-2026-34002 | xorg-x11-server: This update for xorg-x11-server fixes the following issues: - CVE-2026-33999: XKB integer underflow in XkbSetCompatM... | 9.1 | 0.0049 | None reported | |
| High | CVE-2026-33999 | Xorg: xwayland: x.org x server: denial of service via integer underflow in xkb compatibility map handling | 7.8 | 0.0038 | None reported | |
| High | CVE-2026-34001 | xorg-x11-server-common: X.Org is an open-source implementation of the X Window System | 7.8 | 0.0026 | None reported | |
| High | CVE-2026-34003 | xorg-x11-server-common: X.Org is an open-source implementation of the X Window System | 7.8 | 0.0025 | None reported |
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