A lack of signature verification in the bootloader of DENX Software Engineering Das U-Boot (U-Boot) v1.1.3 allows attackers to install craf…

published 2025-08-05 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23651

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

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 firmware files, leading to arbitrary code execution.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-45512 updated 2026-06-28 cvss 6.5

u-boot: Improper Bootloader Signature Verification in U-Boot

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 15 mo ago (2025-08-05)

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/AzhariRamadhan/uboot-cve referenced PoC, tagged "exploit" by a source, unverified
gist.github.com https://gist.github.com/AzhariRamadhan/a5c9644861f46b1eadb1f2a15c7950fe referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command

References

github.com /AzhariRamadhan/uboot-cve
exploit, third-party-advisory
gist.github.com /AzhariRamadhan/a5c9644861f46b1eadb1f2a15c7950fe
exploit, third-party-advisory

Sources

CVE List CVE-2025-45512
NVD CVE-2025-45512

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary