CVE-2021-27431
High
Published: 03 May 2022
Published
03 May 2022
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score
0.0052
67.2th percentile
Risk Priority
15
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-27431 is a high-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Arm Cmsis-Rtos. Its CVSS base score is 7.3 (High).
Operationally, ranked in the top 32.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-14185
Vulnerability details
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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
arm
cmsis-rtos
≤ 2.1.3
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.