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TI-2026-27185 Aliases CVE-2026-34963GHSA-qj4w-p892-c352

barebox EFI PE Loader Memory Safety Vulnerabilities

Priority LOW 38CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00155 4th percentileScored 2026-11-07
Fix Fixed barebox (barebox): 2026.04.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
bareboxbareboxbefore 2026.04.02026.04.0Patch availableCNA
  • barebox Vendorbarebox Affected before 2026.04.0 Fixed in 2026.04.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*before 2026.04.0Vulnerablebarebox
  • cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:* Versions before 2026.04.0 Vulnerable ·barebox

Remediation

  • Fix · CNA barebox (barebox) Fixed in 2026.04.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    barebox 2026.04.0

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-27182 barebox Out-of-Bounds Read in DHCP Option ParsingPriority LOW 31
    • TI-2026-27183 barebox ext4 Extent Parsing Out-of-Bounds ReadPriority LOW 30
    • TI-2026-27184 barebox ext4 Directory Parsing Infinite Loop Denial of ServicePriority LOW 29
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34963
  2. 2026-10-03 Alias added: GHSA-qj4w-p892-c352

References

Patch 1

Other 2

  • TI-2019-11982 Pengutronix barebox through 2019.08.1 has a remote buffer overflow in nfs_readlink_req in… CVSS 3.0CRITICAL 9.8
  • TI-2019-11981 Pengutronix barebox through 2019.08.1 has a remote buffer overflow in nfs_readlink_reply… CVSS 3.0CRITICAL 9.8
  • TI-2020-10888 Pengutronix Barebox through v2020.05.0 has an out-of-bounds read in nfs_read_reply in… CVSS 3.1CRITICAL 9.1
  • TI-2026-25661 barebox: FIT Signature Verification Bypass Vulnerability CVSS 3.1HIGH 8.3
  • TI-2021-15656 common/password.c in Pengutronix barebox through 2021.07.0 leaks timing information… CVSS 3.1HIGH 7.5
  • TI-2021-15655 crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because… CVSS 3.1HIGH 7.5
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences