What’s Vulnerable › Vulnerabilities

CVE-2021-27138

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-17 · updated 2026-06-17

Description

The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.

Affected products

• u-boot: through 2021.01; 2021.04-rc1

References

• https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917
• https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4
• https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0
• https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917
• https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4
• https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0
• https://lists.debian.org/debian-lts-announce/2025/09/msg00037.html

Get alerted when CVE-2021-27138 or the next vulnerability affects your stack