What’s Vulnerable › Vulnerabilities

CVE-2021-27421: NXP MCUXpresso SDK Integer Overflow or Wraparound

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-03 · updated 2026-06-17
• Weakness: CWE-190

Description

NXP MCUXpresso SDK versions prior to 2.8.2 are vulnerable to integer overflow in SDK_Malloc function, which could allow to access memory locations outside the bounds of a specified array, leading to unexpected behavior such segmentation fault when assigning a particular block of memory from the heap via malloc.

Affected products

• NXP MCUXpresso SDK: before 2.8.2 — fixed in 2.8.2

How to fix

Upgrade to a fixed version: NXP MCUXpresso SDK 2.8.2. Check the vendor advisory for mitigations.

References

• https://mcuxpresso.nxp.com/en/welcome
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
• https://mcuxpresso.nxp.com/en/welcome
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04

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