CVE-2026-34963

barebox version prior to 2026.04.0 contains multiple memory-safety vulnerabilities in the EFI PE loader in efi/loader/pe.c where integer overflow in virtual image size computation using 32-bit arithmetic on section VirtualAddress and size values allows undersized heap allocation, and PE section loading logic fails to validate that PointerToRawData plus copied size remains within the PE file buffer. An attacker can supply a malicious EFI PE binary via TFTP, USB, SD card, or network boot to trigger heap buffer overflow or out-of-bounds read from heap memory, potentially achieving code execution in bootloader context.

CVSS v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/barebox/barebox	Product
https://github.com/barebox/barebox/releases/tag/v2026.04.0	Release Notes
https://www.vulncheck.com/advisories/barebox-efi-pe-loader-memory-safety-vulnerabilities	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*

History

13 May 2026, 19:44

Type	Values Removed	Values Added
CPE		cpe:2.3:a:pengutronix:barebox::::::::
First Time		Pengutronix barebox Pengutronix
References	~~() https://github.com/barebox/barebox -~~	() https://github.com/barebox/barebox - Product
References	~~() https://github.com/barebox/barebox/releases/tag/v2026.04.0 -~~	() https://github.com/barebox/barebox/releases/tag/v2026.04.0 - Release Notes
References	~~() https://www.vulncheck.com/advisories/barebox-efi-pe-loader-memory-safety-vulnerabilities -~~	() https://www.vulncheck.com/advisories/barebox-efi-pe-loader-memory-safety-vulnerabilities - Third Party Advisory

11 May 2026, 23:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-11 23:19

Updated : 2026-05-13 19:44

NVD link : CVE-2026-34963

Mitre link : CVE-2026-34963

CVE.ORG link : CVE-2026-34963

JSON object : View

Products Affected

pengutronix

barebox

CWE

CWE-190

Integer Overflow or Wraparound

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