Vulnerability/
https://seclists.org/oss-sec/2026/q4/411

https://seclists.org/oss-sec/2026/q4/411: CVE-2026-97631: P-boot RCE in EDK II PXE driver

Published Oct 28, 2026

Updated

Affected Software

2 affected components

Tianocore EDK II

Tianocore OVMF

Frequently Asked Questions

Which systems are exposed to this issue?

Systems using the EDK II PXE Base Code driver during IPv4 or IPv6 PXE network boot are exposed. The affected component is identified as NetworkPkg/UefiPxeBcDxe, and the listed software includes TianoCore EDK II and TianoCore OVMF.

What must an attacker be able to do to exploit it?

An attacker does not need to authenticate, but must be able to deliver ICMP error messages to the machine while it is PXE-booting. Exploitation occurs during network boot, before the operating system loads.

Do Secure Boot or measured boot prevent exploitation?

No. The described code execution occurs before Secure Boot or measured boot has verified or measured any operating-system component.

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