A lack of signature verification in the bootloader of DENX Software Engineering Das U-Boot (U-Boot) v1.1.3 allows attackers to install crafted… (CVE-2025-45512)
Description
A vulnerability in the bootloader of DENX Software Engineering Das U-Boot (U-Boot) version 1.1.3 allows attackers to install crafted firmware files due to a lack of signature verification. This flaw can lead to arbitrary code execution. The issue affects multiple specific Ubuntu package versions of U-Boot. The CVSS score is 6.5, indicating a medium severity level.
CVSS v3.1
Score 6.5medium
Affected software
pkg:deb/ubuntu/u-boot?arch=source&distro=xenialpkg:deb/ubuntu/u-boot?arch=source&distro=bionicpkg:deb/ubuntu/u-boot?arch=source&distro=focalpkg:deb/ubuntu/u-boot?arch=source&distro=jammypkg:deb/ubuntu/u-boot-nezha?arch=source&distro=jammypkg:deb/ubuntu/u-boot?arch=source&distro=noblepkg:deb/ubuntu/u-boot-nezha?arch=source&distro=noblepkg:deb/ubuntu/u-boot?arch=source&distro=questingpkg:deb/ubuntu/u-boot?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-45512 describes a security vulnerability in the bootloader of DENX Software Engineering Das U-Boot (U-Boot) version 1.1.3, where the bootloader does not verify signatures on firmware files. This lack of signature verification enables attackers to install maliciously crafted firmware, potentially resulting in arbitrary code execution on affected systems. The vulnerability affects numerous specific Ubuntu package versions of U-Boot as listed. The CVSS 3.1 base score is 6.5 with vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N, indicating network attack vector, low attack complexity, no privileges or user interaction required, unchanged scope, and limited confidentiality and integrity impact without availability impact.
Potential Impact
An attacker can exploit this vulnerability to install malicious firmware on affected devices, leading to arbitrary code execution. This can compromise the integrity and confidentiality of the system. However, the vulnerability does not impact system availability. The medium CVSS score reflects these impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor vendor communications for updates and apply any official patches once available. Until then, restrict access to the bootloader interface to trusted personnel and environments to reduce risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2025-45512
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a8effebacd9273b49080879
Added to database: 08/26/2026, 15:02:03 UTC
Last enriched: 09/10/2026, 11:09:33 UTC
Last updated: 10/13/2026, 18:48:14 UTC
Views: 66
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