--- cve: "CVE-2026-34000" severity: "MEDIUM" cvss: 6.1 epss: "49%" vendor: "Red Hat" kev: false exploited: false published: "2026-05-05 14:41:05" tags: [cve, security, medium] source: tsecurity.de CVE-Dossier exported: "2026-09-07T07:26:53+02:00" --- # CVE-2026-34000 > 6.1 MEDIUM ## Beschreibung A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server. ## CVSS-Vektor ``` CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L ``` | Metrik | Wert | Bewertung | |---|---|---| | AV Angriffsvektor | Lokal | good | | AC Komplexität | Gering | bad | | PR Privilegien | Gering | warn | | UI Interaktion | Keine | bad | | S Scope | Unverändert | good | | C Vertraulichkeit | Hoch | bad | | I Integrität | Keine | good | | A Verfügbarkeit | Gering | warn | ## Referenzen - - - - - - - - - - - - - - - - - - - - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34000) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_