Integer Overflow or Wraparound Affecting barebox package, versions [,2026.04.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published14 May 2026
- disclosed12 May 2026
- creditKazuma Matsumoto
Introduced: 12 May 2026
CVE-2026-34963 (opens in a new tab)How to fix?
Upgrade barebox to version 2026.04.0 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the EFI PE loader process in efi/loader/pe.c. An attacker can execute arbitrary code in the bootloader context or cause a denial of service by supplying a crafted EFI PE binary through TFTP, USB, SD card, or network boot, exploiting integer overflow in virtual image size computation and improper validation of PE section loading boundaries.