Integer overflow in Arm Cmsis-Rtos
CVE-2021-27431
ARM CMSIS RTOS2 versions prior to 2.1.3 are vulnerable to integer wrap-around inosRtxMemoryAlloc (local malloc equivalent) function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or injected code execution.
Vulnerability class: Integer Overflow
EPSS: 0.011 (61.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Arm Cmsis-rtos
- Arm Cmsis Rtos2 — versions unspecified
Weakness classification (CWE)
References
- ics-cert@hq.dhs.gov (x_refsource_CONFIRM, US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27431?
- CVE-2021-27431 is a high-severity vulnerability in Arm Cmsis-Rtos, classified under Integer Overflow or Wraparound. CVSS score: 7.3/10. Published 2022-05-03.
- How severe is CVE-2021-27431?
- High severity. CVSS v3 base score is 7.3 out of 10.