Arm Trusted Firmware Out-of-Bounds Write Vulnerability (CVE-2021-27562)

A local attacker, with a low-privilege account, can achieve partial data exposure, complete denial of service or system unavailability. Federal agencies are required to remediate by 2021-11-17 under CISA BOD 22-01.

This is a Out-of-bounds Write (CWE-787) vulnerability in Arm Trusted Firmware. In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an overwrite of secure data, or the printing out of secure data when calling secure functions under the NSPE handler mode. Exploitation requires local access, low attack complexity, a low-privilege authenticated account, and no user interaction required.

Probably yes if any of these apply:

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2021-11-03 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2021-11-17.