CVE-2021-27138 - Vulnerability Details - OpenCVE

Description

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

Published: 2021-02-17

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:denx:u-boot::::::::
	cpe:2.3:a:denx:u-boot:2021.04:rc1::::::

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
Debian DLA	DLA-4320-1	u-boot security update
EUVD	EUVD-2021-13905	The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00059.

Key SSVC decision points have not yet been added.

References

Link	Providers
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

History

Mon, 03 Nov 2025 19:30:00 +0000

Type	Values Removed	Values Added
References		https://lists.debian.org/debian-lts-announce/2025/09/msg00037.html

Subscriptions

Denx U-boot

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-02-17T22:36:52.000Z

Updated: 2025-11-03T18:07:59.724Z

Reserved: 2021-02-10T00:00:00.000Z

Link: CVE-2021-27138

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-02-17T23:15:13.717

Modified: 2025-11-03T19:15:40.210

Link: CVE-2021-27138

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-noinfo

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:R", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-02-17T22:51:29.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-27138", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:R", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0", "refsource": "MISC", "url": "https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0"}, {"name": "https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917", "refsource": "MISC", "url": "https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917"}, {"name": "https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4", "refsource": "MISC", "url": "https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4"}]}}}, "adp": [{"title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00037.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T18:07:59.724Z"}}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-27138", "datePublished": "2021-02-17T22:36:52.000Z", "dateReserved": "2021-02-10T00:00:00.000Z", "dateUpdated": "2025-11-03T18:07:59.724Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*", "matchCriteriaId": "A5899D85-92F8-4CB2-879B-E75488D8471C", "versionEndIncluding": "2021.01", "vulnerable": true}, {"criteria": "cpe:2.3:a:denx:u-boot:2021.04:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7B5BAFE-DC47-41E2-94D9-15A7DC1E3E28", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT."}, {"lang": "es", "value": "El cargador de arranque en Das U-Boot versiones anteriores a 2021.04-rc2, maneja inapropiadamente el uso de direcciones de unidad en un FIT"}], "id": "CVE-2021-27138", "lastModified": "2025-11-03T19:15:40.210", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "cve@mitre.org", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-02-17T23:15:13.717", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00037.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}