An issue was discovered in InsydeH2O. A malicious operating system can tamper with a runtime-writable EFI variable, leading to out-of-bounds memory reads and a denial of service. This is fixed in version 01.01.04.0016.
https://www.insyde.com/security-pledge/SA-2023028
https://www.insyde.com/security-pledge
Source: Mitre, NVD
Published: 2023-08-03
Updated: 2026-06-17
Base Score: 6.2
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:C
Severity: Medium
Base Score: 7.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Severity: High
EPSS: 0.00051