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.

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History

Tue, 12 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 12 May 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Barebox
Barebox barebox
Vendors & Products Barebox
Barebox barebox

Mon, 11 May 2026 22:45:00 +0000

Type Values Removed Values Added
Description 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.
Title barebox EFI PE Loader Memory Safety Vulnerabilities
Weaknesses CWE-190
References
Metrics cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-12T14:29:59.597Z

Reserved: 2026-03-31T17:58:43.754Z

Link: CVE-2026-34963

cve-icon Vulnrichment

Updated: 2026-05-12T12:50:59.362Z

cve-icon NVD

Status : Received

Published: 2026-05-11T23:19:47.950

Modified: 2026-05-11T23:19:47.950

Link: CVE-2026-34963

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-12T00:15:07Z

Weaknesses