CVE-2026-21385: Qualcomm Multiple Chipsets Memory Corruption Vulnerability

Vulnerability summary

CVE-2026-21385 is a high (CVSS 7.8) Integer Overflow or Wraparound vulnerability in Qualcomm Multiple Chipsets. It is known to be exploited: CISA lists it, first on 03-03-2026. EPSS estimates a 1.29% chance of exploitation in the next 30 days, higher than 70% of scored vulnerabilities.

Timeline

1. 02-03-2026
   PublishedVulnerability first disclosed.
2. 03-03-2026
   Added to CISA KEVQualcomm Multiple Chipsets Memory Corruption Vulnerability
3. 04-03-2026
   Last modifiedVulnerability information updated.
4. 24-03-2026
   CISA remediation dueApply mitigations per vendor instructions.

Description

Memory corruption while using alignments for memory allocation.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.