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Intel QAT Drivers CVE-2026-20793

| EUVDEUVD-2026-29529 MEDIUM
Unchecked Return Value (CWE-252)
2026-05-12 intel GHSA-w95w-74rp-vcx9
4.8
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
4.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
3.3 LOW

Local-only vector confirmed by description and CVSS 4.0 source; PR:L reflects authenticated low-privilege requirement; no confidentiality or integrity impact per description.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Analysis Generated
Jul 23, 2026 - 22:20 vuln.today
CVSS changed
May 12, 2026 - 17:22 NVD
4.8 (MEDIUM)
CVE Published
May 12, 2026 - 16:34 nvd
MEDIUM 4.8
CVE Published
May 12, 2026 - 16:34 nvd
UNKNOWN (no severity yet)

DescriptionCVE.org

Unchecked return value for some Intel(R) QAT software drivers for Windows before version 1.13 within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (low) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

AnalysisAI

Intel QAT (Quick Assist Technology) software drivers for Windows before version 1.13 contain an unchecked return value flaw in Ring 3 user-space application code, enabling a local authenticated attacker to cause a denial of service. The vulnerability carries a CVSS 4.0 score of 4.8 with strictly local access and low-privilege requirements, limiting blast radius to availability of the affected system only. No public exploit code exists and CISA has not listed this in KEV; EPSS at the 3rd percentile and SSVC exploitation status of 'none' confirm this is currently theoretical rather than actively targeted.

Technical ContextAI

Intel QAT (Quick Assist Technology) is a hardware-accelerated cryptographic and compression offload solution found in select Intel processors and PCIe adapters, with a Windows software driver stack bridging Ring 3 user-space applications to the underlying hardware. The root cause is CWE-252 (Unchecked Return Value): a function call in the Ring 3 driver component does not validate the return value of an underlying operation, meaning error conditions that should halt or redirect execution are silently ignored. On Windows, this class of defect in driver user-space shims can destabilize the driver's internal state, leading to crashes or hung operations that degrade availability. The CPE identifies the affected artifact as intel(r)_qat_software_drivers_for_windows versions prior to 1.13.

RemediationAI

Upgrade Intel QAT software drivers for Windows to version 1.13 or later, as confirmed by Intel Security Advisory INTEL-SA-01387 at https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01387.html. This is the primary and definitive fix. If immediate patching is not feasible, the attack surface is inherently constrained by the local-access requirement: restrict interactive and remote desktop access to QAT-equipped hosts to authorized personnel only, and apply least-privilege principles to service accounts that interact with QAT workloads. Disabling the QAT driver entirely is an option if hardware offload is non-essential, but this will eliminate cryptographic and compression acceleration, impacting throughput-sensitive workloads. No network-layer controls are relevant given the local-only attack vector.

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CVE-2026-20793 vulnerability details – vuln.today

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