CVE-2026-26399
MEDIUM EPSS 7.6%
Published Apr 20, 20262mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low
Threat Intelligence
EPSS Exploit Probability
7.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-562
References 2
- github.com https://github.com/Acen28/CVE-2026-26399-Disclosure
- github.com https://github.com/stm32duino/Arduino_Core_STM32/releases/tag/1.6.1
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.