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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.011 (65.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Arm Cmsis-Rtos
- Arm Cmsis Rtos2 — versions unspecified
Weakness classification (CWE)
References
- www.cisa.gov/uscert/ics/advisories/icsa-21-119-04 (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.