CVE-2026-5165 | virtio-win kvm-guest-drivers-windows VirtIO Block Device expired pointer dereference

VDB-354197 · CVE-2026-5165 · GCVE-0-2026-5165 VIRTIO-WIN KVM-GUEST-DRIVERS-WINDOWS VIRTIO BLOCK DEVICE EXPIRED POINTER DEREFERENCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.6 $0-$5k 1.25+ Summaryinfo A vulnerability marked as critical has been reported in virtio-win kvm-guest-drivers-windows. This affects an unknown function of the component VirtIO Block Device. The manipulation leads to expired pointer dereference. This vulnerability is uniquely identified as CVE-2026-5165. Local access is required to approach this attack. No exploit exists. Applying a patch is the recommended action to fix this issue. Detailsinfo A vulnerability, which was classified as critical, has been found in virtio-win kvm-guest-drivers-windows (the affected version is unknown). This issue affects an unknown code of the component VirtIO Block Device. The manipulation with an unknown input leads to a expired pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-825. The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is: A flaw was found in virtio-win, specifically within the VirtIO Block (BLK) device. When the device undergoes a reset, it fails to properly manage memory, resulting in a use-after-free vulnerability. This issue could allow a local attacker to corrupt system memory, potentially leading to system instability or unexpected behavior. The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2026-5165 since 03/30/2026. The exploitation is known to be easy. An attack has to be approached locally. Additional levels of successful authentication are required for exploitation. Neither technical details nor an exploit are publicly available. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. Productinfo Type Hardware Driver Software Vendor virtio-win Name kvm-guest-drivers-windows Website Product: https://github.com/virtio-win/kvm-guest-drivers-windows/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.7 VulDB Meta Temp Score: 6.6 VulDB Base Score: 6.7 VulDB Temp Score: 6.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.7 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: Expired pointer dereference CWE: CWE-825 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: Patch Status: 🔍 0-Day Time: 🔒 Patch: github.com Timelineinfo 03/30/2026 Advisory disclosed 03/30/2026 +0 days CVE reserved 03/30/2026 +0 days VulDB entry created 03/30/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: access.redhat.com Status: Confirmed CVE: CVE-2026-5165 (🔒) GCVE (CVE): GCVE-0-2026-5165 GCVE (VulDB): GCVE-100-354197 Entryinfo Created: 03/30/2026 17:30 Changes: 03/30/2026 17:30 (63) Complete: 🔍 Cache ID: 99:919:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸