CVE-2021-27138
mediumpriority · track · 31EPSS 0.011 · 66 %ileEUUSgrimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.10% (66th) EPSS
CVSS 6.8 · medium
Who says so?
3 sources
cnnvd · enisa_euvd · nvd
EPSS · scored 2026-10-27
The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.
01
cvss
Technical severity, 0–10. One row per scoring source.
7.8
010
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.8
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · cve@mitre.org USexploitability 1.8 · impact 5.9
02
weaknesses
The CWE weakness classes this flaw belongs to.
CWE-20USLLM-inferred
03
affected products (3)
Products and version ranges known to be affected.
04
also known as (3)
Other names and identifiers for this entity.
05
sources
Which sources assert this record, and when.
06
references (11)
External citations — patches, advisories, analysis.
- https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917cnnvd
- https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4cnnvd
- https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-27138cnnvd
- https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917enisa_euvd
- https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4enisa_euvd
- https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0enisa_euvd
- https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917PatchThird Party Advisorynvd
scry
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan