CVE-2026-23554 | Xen EPT use after free (Nessus ID 302811 / WID-SEC-2026-0760)

VDB-351512 · CVE-2026-23554 · NESSUS 302811 XEN EPT USE AFTER FREE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $5k-$25k 1.02 Summaryinfo A vulnerability classified as critical was found in Xen. The impacted element is an unknown function of the component EPT. Such manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2026-23554. No exploit exists. Applying a patch is advised to resolve this issue. Detailsinfo A vulnerability was found in Xen (version unknown). It has been rated as critical. Affected by this issue is an unknown function of the component EPT. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The advisory is shared for download at xenbits.xen.org. This vulnerability is handled as CVE-2026-23554. The exploitation is known to be easy. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 03/18/2026). The vulnerability scanner Nessus provides a plugin with the ID 302811 (Linux Distros Unpatched Vulnerability : CVE-2026-23554), which helps to determine the existence of the flaw in a target environment. Applying a patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org. The vulnerability is also documented in the databases at Tenable (302811) and CERT Bund (WID-SEC-2026-0760). Affected Open Source Xen Citrix Systems XenServer Productinfo Type Virtualization Software Name Xen License open-source CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.0 VulDB Meta Temp Score: 7.6 VulDB Base Score: 8.0 VulDB Temp Score: 7.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 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: Use after free CWE: CWE-416 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Nessus ID: 302811 Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23554 Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Patch Status: 🔍 0-Day Time: 🔒 Patch: xenbits.xen.org Timelineinfo 03/18/2026 Advisory disclosed 03/18/2026 +0 days VulDB entry created 03/18/2026 +0 days VulDB entry last update Sourcesinfo Advisory: xenbits.xen.org Status: Confirmed CVE: CVE-2026-23554 (🔒) GCVE (CVE): GCVE-0-2026-23554 GCVE (VulDB): GCVE-100-351512 CERT Bund: WID-SEC-2026-0760 - Xen und Citrix Systems XenServer: Mehrere Schwachstellen Entryinfo Created: 03/18/2026 09:24 Updated: 03/18/2026 12:12 Changes: 03/18/2026 09:24 (51), 03/18/2026 10:58 (2), 03/18/2026 12:12 (7) Complete: 🔍 Cache ID: 99:F18:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸