CVE-2026-19382: Almico Speedfan MSR Index speedfan.sys KiSystemCall64 memory leak

Severity: low (CVSS 2.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-10 · updated 2026-10-23
Weakness: CWE-401

Description

A weakness has been identified in Almico Speedfan 4.52. This affects the function KiSystemCall64 in the library speedfan.sys of the component MSR Index Handler. Executing a manipulation can lead to memory leak. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

Almico Speedfan: 4.52

References

https://drive.google.com/file/d/18ocvgZ9aYGpaqMuojNH1jzVpQ1AJBI7d/view?usp=sharing
https://vuldb.com/cve/CVE-2026-19382
https://vuldb.com/submit/866833
https://vuldb.com/vuln/387275
https://vuldb.com/vuln/387275/cti

Get alerted when CVE-2026-19382 or the next vulnerability affects your stack