CVE-2026-33999
CVE-2026-33999 · Xorg: xwayland: x.org x server: denial of service via integer underflow in xkb compatibility map handling
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.
CVSS 7.8 · High · EPSS 0.4% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
red hat enterprise linux 10
- Versions
- ≥ 0:24.1.5-6.el10_1: Not affected (rpm)
No fix published
red hat enterprise linux 10
- Versions
- ≥ 0:24.1.9-4.el10_2: Not affected (rpm)
No fix published
red hat enterprise linux 10.0 extended update support
- Versions
- ≥ 0:24.1.5-6.el10_0: Not affected (rpm)
No fix published
red hat enterprise linux 6 extended lifecycle support - extension
- Versions
- ≥ 0:1.1.0-25.el6_10.16: Not affected (rpm)
No fix published
red hat enterprise linux 7 extended lifecycle support
- Versions
- ≥ 0:1.20.4-34.el7_9: Not affected (rpm)
No fix published
red hat enterprise linux 7 extended lifecycle support
- Versions
- ≥ 0:1.8.0-36.el7_9.4: Not affected (rpm)
No fix published
red hat enterprise linux 8
- Versions
- ≥ 0:21.1.3-20.el8_10: Not affected (rpm)
No fix published
red hat enterprise linux 8
- Versions
- ≥ 0:1.20.11-28.el8_10: Not affected (rpm)
No fix published
red hat enterprise linux 8
- Versions
- ≥ 0:1.15.0-9.el8_10: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 advanced mission critical update support
- Versions
- ≥ 0:1.20.10-4.el8_4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 advanced mission critical update support
- Versions
- ≥ 0:1.11.0-8.el8_4.15: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 extended update support long-life add-on
- Versions
- ≥ 0:1.20.10-4.el8_4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 extended update support long-life add-on
- Versions
- ≥ 0:1.11.0-8.el8_4.15: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 advanced mission critical update support
- Versions
- ≥ 0:21.1.3-2.el8_6.6: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 advanced mission critical update support
- Versions
- ≥ 0:1.20.11-7.el8_6: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 advanced mission critical update support
- Versions
- ≥ 0:1.12.0-6.el8_6.17: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 extended update support long-life add-on
- Versions
- ≥ 0:1.12.0-6.el8_6.17: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 telecommunications update service
- Versions
- ≥ 0:21.1.3-2.el8_6.6: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 telecommunications update service
- Versions
- ≥ 0:1.20.11-7.el8_6: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 update services for sap solutions
- Versions
- ≥ 0:21.1.3-2.el8_6.6: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 update services for sap solutions
- Versions
- ≥ 0:1.20.11-7.el8_6: Not affected (rpm)
No fix published
red hat enterprise linux 8.8 telecommunications update service
- Versions
- ≥ 0:21.1.3-13.el8_8: Not affected (rpm)
No fix published
red hat enterprise linux 8.8 telecommunications update service
- Versions
- ≥ 0:1.20.11-18.el8_8: Not affected (rpm)
No fix published
red hat enterprise linux 8.8 telecommunications update service
- Versions
- ≥ 0:1.12.0-15.el8_8.17: Not affected (rpm)
No fix published
Original sources
- https://access.redhat.com/errata/RHSA-2026:10739
- https://access.redhat.com/errata/RHSA-2026:11352
- https://access.redhat.com/errata/RHSA-2026:11369
- https://access.redhat.com/errata/RHSA-2026:11388
- https://access.redhat.com/errata/RHSA-2026:11656
- https://access.redhat.com/errata/RHSA-2026:11692
- https://access.redhat.com/errata/RHSA-2026:13414
- https://access.redhat.com/errata/RHSA-2026:19125
- https://access.redhat.com/errata/RHSA-2026:19342
- https://access.redhat.com/errata/RHSA-2026:19343
- https://access.redhat.com/errata/RHSA-2026:19344
- https://access.redhat.com/errata/RHSA-2026:20547
- https://access.redhat.com/errata/RHSA-2026:20555
- https://access.redhat.com/errata/RHSA-2026:20557
- https://access.redhat.com/errata/RHSA-2026:20558
- https://access.redhat.com/errata/RHSA-2026:20560
- https://access.redhat.com/errata/RHSA-2026:20561
- https://access.redhat.com/errata/RHSA-2026:20562
- https://access.redhat.com/errata/RHSA-2026:20563
- https://access.redhat.com/errata/RHSA-2026:20575
- https://access.redhat.com/errata/RHSA-2026:20576
- https://access.redhat.com/errata/RHSA-2026:20590
- https://access.redhat.com/errata/RHSA-2026:21699
- https://nvd.nist.gov/vuln/detail/CVE-2026-33999