Integer overflow in Arm Armv8-M
CVE-2020-16273
In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.
EPSS: 0.003 (26.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Arm Armv8-m
- Arm Armv8-m_firmware
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-16273?
- CVE-2020-16273 is a high-severity vulnerability in Arm Armv8-M, classified under Integer Underflow. CVSS score: 7.8/10. Published 2020-11-12.
- How severe is CVE-2020-16273?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-16273 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.