CVE-2021-27427 | BDVDB-2026-175129 Detail

RIOT OSRIOT OS

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact low. Attack vector: network.

Weaknesses#

CWE-190 Integer Overflow or Wraparound

References#

Exploit#

No public exploit known

History#

Version 12022-05-03Record published in the CVE List.
Version 22025-04-16Most recent update recorded in the CVE List.

Published

Published: 2022-05-03
Last modified: 2025-04-16

Vendor information

Vendor: RIOT OS
Product: RIOT OS

All RIOT OS vulnerabilities

Score

7.3 High

EPSS

1.6%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 77.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
2020.01.1
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.3 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).