High severity7.8NVD Advisory· Published Apr 23, 2026· Updated May 4, 2026
CVE-2026-33999
CVE-2026-33999
Description
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.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
9- access.redhat.com/errata/RHSA-2026:10739nvd
- access.redhat.com/errata/RHSA-2026:11352nvd
- access.redhat.com/errata/RHSA-2026:11369nvd
- access.redhat.com/errata/RHSA-2026:11388nvd
- access.redhat.com/errata/RHSA-2026:11656nvd
- access.redhat.com/errata/RHSA-2026:11692nvd
- access.redhat.com/errata/RHSA-2026:13414nvd
- access.redhat.com/security/cve/CVE-2026-33999nvd
- bugzilla.redhat.com/show_bug.cginvd
News mentions
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