Kernel memory disclosure via unchecked IOCTL address
Published Jan 27, 2026 · Updated Jan 27, 2026
Improper input validation in the CPU-Z kernel driver in CPUID CPU-Z 2.17 and earlier allows local users to read kernel memory. The cpuz161.sys driver dereferences an address supplied in an IOCTL input buffer and writes the resulting kernel value into the caller's system buffer. Low-privileged local access is required; the published proof of concept reads the System process token, while the direct impact remains information disclosure.
Summary
What happened
Improper input validation in the CPU-Z kernel driver in CPUID CPU-Z 2.17 and earlier allows local users to read kernel memory. The cpuz161.sys driver dereferences an address supplied in an IOCTL input buffer and writes the resulting kernel value into the caller's system buffer. Low-privileged local access is required; the published proof of concept reads the System process token, while the direct impact remains information disclosure.
The record
- CVE
- CVE-2025-65264
- Published
- Jan 27, 2026
- Updated
- Jan 27, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-20
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 27, 2026CVE publishedPublication date reported by the CVE source.
- Jan 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- CVE-2025-65264 kernel-memory read proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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