CVE-2026-26399 | stm32duino Arduino_Core_STM32 up to 1.6.x pwm_start memory corruption

VDB-358339 · CVE-2026-26399 · EUVD-2026-23912 STM32DUINO ARDUINO_CORE_STM32 UP TO 1.6.X PWM_START MEMORY CORRUPTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $0-$5k 4.08 Summaryinfo A vulnerability identified as critical has been detected in stm32duino Arduino_Core_STM32 up to 1.6.x. This vulnerability affects the function pwm_start. This manipulation causes memory corruption. The identification of this vulnerability is CVE-2026-26399. There is no exploit available. You should upgrade the affected component. Detailsinfo A vulnerability has been found in stm32duino Arduino_Core_STM32 up to 1.6.x and classified as critical. Affected by this vulnerability is the function pwm_start. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE 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. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-26399 since 02/16/2026. The exploitation appears to be easy. Technical details of the vulnerability are known, but there is no available exploit. Upgrading to version 1.7.0 eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23912). Productinfo Vendor stm32duino Name Arduino_Core_STM32 Version 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Website Product: https://github.com/stm32duino/Arduino_Core_STM32/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.0 VulDB Meta Temp Score: 7.6 VulDB Base Score: 8.0 VulDB Temp Score: 7.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Memory corruption CWE: CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Arduino_Core_STM32 1.7.0 Timelineinfo 02/16/2026 CVE reserved 04/20/2026 +62 days Advisory disclosed 04/20/2026 +0 days VulDB entry created 04/20/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-26399 (🔒) GCVE (CVE): GCVE-0-2026-26399 GCVE (VulDB): GCVE-100-358339 EUVD: 🔒 Entryinfo Created: 04/20/2026 19:58 Updated: 04/20/2026 23:33 Changes: 04/20/2026 19:58 (55), 04/20/2026 23:33 (1) Complete: 🔍 Cache ID: 99:E45:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸