CVE-2026-23763: CWE-668 Exposure of Resource to Wrong Sphere in VB-Audio Software Matrix
VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a local privilege escalation vulnerability in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys). The driver allocates a 128-byte non-paged pool buffer and, upon receiving IOCTL 0x222060, maps it into user space using an MDL and MmMapLockedPagesSpecifyCache. Because the allocation size is not page-aligned, the mapping exposes the entire 0x1000-byte kernel page containing the buffer plus adjacent non-paged pool allocations with read/write permissions. An unprivileged local attacker can open a device handle (using the required 0x800 attribute flag), invoke the IOCTL to obtain the mapping, and then read or modify live kernel objects and pointers present on that page. This enables bypass of KASLR, arbitrary kernel memory read/write within the exposed page, corruption of kernel objects, and escalation to SYSTEM.
AI Analysis
Technical Summary
The vulnerability (CVE-2026-23763) exists in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys) used by VB-Audio Software Matrix and Matrix Coconut. When handling IOCTL 0x222060, the driver allocates a 128-byte non-paged pool buffer but maps an entire 0x1000-byte kernel page into user space due to lack of page alignment. This mapping grants read/write access to adjacent kernel memory, enabling an attacker with local low privileges to read and write kernel memory, bypass KASLR, corrupt kernel objects, and escalate privileges to SYSTEM. The CVSS 4.0 score is 8.5, indicating high severity.
Potential Impact
An unprivileged local attacker can exploit this vulnerability to gain arbitrary read/write access to kernel memory within the exposed page. This can lead to bypassing KASLR, corruption of kernel objects, and escalation of privileges to SYSTEM level, compromising the integrity and security of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a patch is available, restrict local access to trusted users only and monitor for suspicious activity related to the VBMatrix VAIO driver. Avoid running untrusted code locally on affected systems.
CVE-2026-23763: CWE-668 Exposure of Resource to Wrong Sphere in VB-Audio Software Matrix
Description
VB-Audio Matrix and Matrix Coconut (versions ending in 1.0.2.2 and 2.0.2.2 and earlier, respectively), contain a local privilege escalation vulnerability in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys). The driver allocates a 128-byte non-paged pool buffer and, upon receiving IOCTL 0x222060, maps it into user space using an MDL and MmMapLockedPagesSpecifyCache. Because the allocation size is not page-aligned, the mapping exposes the entire 0x1000-byte kernel page containing the buffer plus adjacent non-paged pool allocations with read/write permissions. An unprivileged local attacker can open a device handle (using the required 0x800 attribute flag), invoke the IOCTL to obtain the mapping, and then read or modify live kernel objects and pointers present on that page. This enables bypass of KASLR, arbitrary kernel memory read/write within the exposed page, corruption of kernel objects, and escalation to SYSTEM.
CVSS v4.0
Score 8.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2026-23763) exists in the VBMatrix VAIO virtual audio driver (vbmatrixvaio64*_win10.sys) used by VB-Audio Software Matrix and Matrix Coconut. When handling IOCTL 0x222060, the driver allocates a 128-byte non-paged pool buffer but maps an entire 0x1000-byte kernel page into user space due to lack of page alignment. This mapping grants read/write access to adjacent kernel memory, enabling an attacker with local low privileges to read and write kernel memory, bypass KASLR, corrupt kernel objects, and escalate privileges to SYSTEM. The CVSS 4.0 score is 8.5, indicating high severity.
Potential Impact
An unprivileged local attacker can exploit this vulnerability to gain arbitrary read/write access to kernel memory within the exposed page. This can lead to bypassing KASLR, corruption of kernel objects, and escalation of privileges to SYSTEM level, compromising the integrity and security of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a patch is available, restrict local access to trusted users only and monitor for suspicious activity related to the VBMatrix VAIO driver. Avoid running untrusted code locally on affected systems.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-01-15T18:42:20.939Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 697251f54623b1157c7bcf96
Added to database: 01/22/2026, 16:36:05 UTC
Last enriched: 05/14/2026, 02:09:18 UTC
Last updated: 09/10/2026, 19:36:53 UTC
Views: 256
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