CVE-2026-26399

A stack-use-after-return issue exists in the Arduino_Core_STM32 library prior to version 1.7.0

Medium · published April 20, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
3.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00142 · 3.2th percentile
Published
2026-04-20T00:00Z
EPSS history
Timeline
  • 20 APR 00:00Z
    A stack-use-after-return issue exists in the Arduino_Core_STM32 library prior to version 1.7.0
    cvelistv5