SB2026110403 - Remote code execution in EDK2

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Main Vulnerability Database SB2026110403

SB2026110403 - Remote code execution in EDK2

Published: November 4, 2026

Security Bulletin ID SB2026110403
CSH Severity
High
Patch available
NO
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Buffer overflow (CVE-ID: CVE-2026-97631)

CWE-ID: CWE-120 - Buffer overflow

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in BIOS when the affected machine is PXE-booting over IPv4 or IPv6. A remote attacker can use specially crafted ICMP error messages, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References