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CVE-2021-27433

HIGH
Published 2022-05-03T20:26:51.000Z
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Expert Analysis

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CVSS Score

V3.1
7.3
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.038
probability
of exploitation in the wild

There is a 3.8% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.875
Higher than 87.5% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
LOW
Availability
LOW

Description

ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbed_krbs, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

ARM

mbed-ualloc memory library

Affected Versions:

1.3.0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed CRITICAL

GHSA-5r3j-39g2-55xr

Advisory Details

ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbed_krbs, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

CVSS Scoring

CVSS Score

9.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-27433
WEB https://github.com/ARMmbed/mbed-os/pull/14408
WEB https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04

Advisory provided by GitHub Security Advisory Database. Published: May 4, 2022, Modified: May 13, 2022

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
https://github.com/ARMmbed/mbed-os/pull/14408
Published: 2022-05-03T20:26:51.000Z
Last Modified: 2025-04-16T16:24:24.018Z
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