CVE-2026-26399

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

A stack-use-after-return issue exists in the Arduino_Core_STM32 library prior to version 1.7.0. The pwm_start() function allocates a TIM_HandleTypeDef structure on the stack and passes its address to HAL initialization routines, where it is stored in a global timer handle registry. After the function returns, interrupt service routines may dereference this dangling pointer, resulting in memory corruption.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness enumeration

CWE-562

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

No affected versions have been published.

Timeline

Published: Apr 20, 2026
Last modified: Jun 17, 2026
NVD status: Awaiting Analysis

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