VDB
CVE-2026-33999
CVE-2026-33999
PUBLISHED
CVSS 7.800000190734863 HIGH
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.
EPSS 0.00% · 0.2th percentile
Risk Scores
CVSS v3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.00%
0.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 10 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 8 |
Timeline
- Apr 14, 2026 CVE Published
- Apr 15, 2026 PoC Published
- Apr 15, 2026 PoC Published
- Apr 19, 2026 PoC Published
- Apr 22, 2026 PoC Published
- Apr 23, 2026 PoC Published
- Apr 24, 2026 Security Advisory
- Apr 27, 2026 Distribution Patch
- Apr 27, 2026 Security Advisory
- Apr 28, 2026 Distribution Patch
- Apr 28, 2026 Security Advisory
- Apr 28, 2026 Distribution Patch