CVE-2021-27427

RIOT OS Integer Overflow or Wraparound

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Published May 3, 2022 CVSS 3.1 · 7.3 High EPSS 1.7% KEV · Not listed

Description

RIOT OS version 2020.01.1 is vulnerable to integer wrap-around in its implementation of calloc function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected Products

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

Vendor Product Default status Versions

RIOT OS

RIOT OS

affected

Version	Status	Constraints
`2020.01.1`	affected	—

Configuration 1 [-]

cpe:2.3:o:riot-os:riot:2020.01.1:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

RIOT OS update available.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-14181	RIOT OS version 2020.01.1 is vulnerable to integer wrap-around in its implementation of calloc function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 1.7% (1.675% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/RIOT-OS/RIOT
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04

History

Apr 16, 2025 5:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Riot-os Riot

Weaknesses

CWE-190

Sources

CVE record Updated: Apr 16, 2025, 4:25 PM

Status: PUBLISHED
Assigner: icscert
Published: May 3, 2022, 8:16 PM
Updated: Apr 16, 2025, 4:25 PM
Reserved: Feb 19, 2021, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 3, 2024, 8:48 PM

Updated: Aug 3, 2024, 8:48 PM

NVD Updated: Jun 17, 2026, 3:44 AM

Status: Modified
Published: May 3, 2022, 9:15 PM
Modified: Jun 17, 2026, 3:44 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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