What is CVE-2021-27433?

CVE-2021-27433 is a high-severity vulnerability in Arm Mbed Ualloc, classified under Integer Overflow or Wraparound. CVSS score: 7.3/10. Published 2022-05-03.

How severe is CVE-2021-27433?

High severity. CVSS v3 base score is 7.3 out of 10.

Integer overflow in Arm Mbed Ualloc

CVE-2021-27433

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.

Vulnerability class: Integer Overflow

EPSS: 0.017 (74.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Arm Mbed_ualloc — versions 1.3.0
Arm Mbed-ualloc Memory Library — versions 1.3.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

ics-cert@hq.dhs.gov (x_refsource_CONFIRM, US Government Resource, Third Party Advisory)
ics-cert@hq.dhs.gov (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-27433?: CVE-2021-27433 is a high-severity vulnerability in Arm Mbed Ualloc, classified under Integer Overflow or Wraparound. CVSS score: 7.3/10. Published 2022-05-03.
How severe is CVE-2021-27433?: High severity. CVSS v3 base score is 7.3 out of 10.