CVE-2026-34003 | X.org X Server XKB Key Types Request out-of-bounds (EUVD-2026-25231)

VDB-359151 · CVE-2026-34003 · EUVD-2026-25231 X.ORG X SERVER XKB KEY TYPES REQUEST OUT-OF-BOUNDS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.8 $0-$5k 2.08 Summaryinfo A vulnerability identified as critical has been detected in X.org X Server. Affected by this issue is some unknown functionality of the component XKB Key Types Request Handler. Performing a manipulation results in out-of-bounds. This vulnerability is identified as CVE-2026-34003. The attack is only possible with local access. There is not any exploit available. Detailsinfo A vulnerability was found in X.org X Server (affected version not known). It has been classified as critical. This affects some unknown functionality of the component XKB Key Types Request Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible. It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-34003 since 03/25/2026. The exploitability is told to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-25231). Productinfo Vendor X.org Name X Server License open-source Website Vendor: https://www.x.org/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.8 VulDB Meta Temp Score: 7.8 VulDB Base Score: 7.8 VulDB Temp Score: 7.8 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.8 CNA Vector (redhat): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Out-of-bounds CWE: CWE-125 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/25/2026 CVE reserved 04/23/2026 +28 days Advisory disclosed 04/23/2026 +0 days VulDB entry created 04/23/2026 +0 days VulDB entry last update Sourcesinfo Vendor: x.org Advisory: access.redhat.com Status: Confirmed CVE: CVE-2026-34003 (🔒) GCVE (CVE): GCVE-0-2026-34003 GCVE (VulDB): GCVE-100-359151 EUVD: 🔒 Entryinfo Created: 04/23/2026 18:14 Updated: 04/23/2026 19:29 Changes: 04/23/2026 18:14 (61), 04/23/2026 19:29 (1) Complete: 🔍 Cache ID: 99:845:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸