CVE-2026-33999
| Summary |
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.
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| Publication Date |
April 24, 2026, 1:16 a.m. |
| Registration Date |
April 25, 2026, 4:06 a.m. |
| Last Update |
April 24, 2026, 11:41 p.m. |
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CVSS3.1 : HIGH
|
| スコア |
7.8
|
| Vector |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 攻撃元区分(AV) |
ローカル |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
低 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
高 |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
高 |
Related information, measures and tools
Common Vulnerabilities List