CVE-2026-93520
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- CVE-2026-93520
CVE Details
| Release Date: | 2026-10-28 | |
| Impact: | Moderate | What is this? |
Description
A heap buffer overflow caused by mismatching size calculations between XkbAllocNames and ChangeKeycodeRange in X.org X server before 2.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
See more information about CVE-2026-93520 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 7.8 |
| Vector String: | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Version: | 3.1 |
| Attack Vector: | Local |
| Attack Complexity: | Low |
| Privileges Required: | Low |
| User Interaction: | None |
| Scope: | Unchanged |
| Confidentiality Impact: | High |
| Integrity Impact: | High |
| Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 10 (xorg-x11-server-Xwayland) | ELSA-2026-85191 | 2026-10-19 |
| Oracle Linux version 8 (xorg-x11-server) | ELSA-2026-89747 | 2026-10-26 |
| Oracle Linux version 8 (xorg-x11-server-Xwayland) | ELSA-2026-86907 | 2026-10-21 |
| Oracle Linux version 8 (xorg-x11-server-Xwayland) | ELSA-2026-95281 | 2026-11-04 |
| Oracle Linux version 9 (xorg-x11-server) | ELSA-2026-84574 | 2026-10-19 |
| Oracle Linux version 9 (xorg-x11-server-Xwayland) | ELSA-2026-85193 | 2026-10-19 |
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