Vulnerability · Published May 16, 2026 · Assigned by mitre
CVE-2026-46728
High 8.2
In plain English
A high-severity security flaw in U-Boot from denx. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.2%top 88.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | u-boot | 2023.01+dfsg-2+deb12u3 | DEBIAN-CVE-2026-46728 |
| Debian:13 | u-boot | 2025.01-3+deb13u1 | DEBIAN-CVE-2026-46728 |
| Debian:14 | u-boot | 2025.01-3.2 | DEBIAN-CVE-2026-46728 |
| Ubuntu:22.04:LTS | u-boot | no fix listed | UBUNTU-CVE-2026-46728 |
| Ubuntu:24.04:LTS | u-boot | no fix listed | UBUNTU-CVE-2026-46728 |
| Ubuntu:25.10 | u-boot | no fix listed | UBUNTU-CVE-2026-46728 |
| Ubuntu:26.04:LTS | u-boot | no fix listed | UBUNTU-CVE-2026-46728 |
| Ubuntu:26.10 | u-boot | no fix listed | UBUNTU-CVE-2026-46728 |
| Ubuntu:22.04:LTS | u-boot-nezha | no fix listed | UBUNTU-CVE-2026-46728 |
| Ubuntu:24.04:LTS | u-boot-nezha | no fix listed | UBUNTU-CVE-2026-46728 |
Affected products (as reported)
Weakness: CWE-346 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H