CVE-2026-34963
highpriority · track · 31EPSS 0.002 · 5 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.6
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/barebox/barebox/releases/Patchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-34963cnnvd
- https://github.com/barebox/bareboxenisa_euvd
- https://github.com/barebox/barebox/releases/tag/v2026.04.0enisa_euvd
- https://www.vulncheck.com/advisories/barebox-efi-pe-loader-memory-safety-vulnerabilitiesenisa_euvd
- https://y637f9qq2x.com/posts/barebox-sandbox-vulns/enisa_euvd
- https://github.com/barebox/bareboxProductnvd
- https://github.com/barebox/barebox/releases/tag/v2026.04.0Release Notesnvd
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