InsydeH2O IHISI SMM is vulnerable to unsafe memory write operations

Overview An Out-of-bounds Write vulnerability in the InsydeH2O IHISI software used by HP PC BIOS can allow a local attacker with OS kernel privileges to perform arbitrary physical memory writes, including writes to System Management RAM SMRAM. Because the vulnerable code executes in System...

CVE-2026-12855

CVE-2026-12855 is an unvalidated memory boundary flaw in H19WMIHandlerSmm , an SMM (System Management Mode) handler component in UEFI firmware. The vulnerable code was developed specifically for HP projects and is associated with Insyde firmware (per the Insyde security advisory reference). An at...

CVE-2026-12855 H19WMIHandlerSmm: unvalidated memory boundary could result in arbitrary code execution.

Unvalidated memory boundary could result in arbitrary code execution. The vulnerability exists in the code developed specifically for HP projects...

CVE-2026-12855 H19WMIHandlerSmm: unvalidated memory boundary could result in arbitrary code execution.

Unvalidated memory boundary could result in arbitrary code execution. The vulnerability exists in the code developed specifically for HP projects...