CVE-2026-21385
Qualcomm Multiple Chipsets Memory Corruption Vulnerability
Qualcomm Multiple Chipsets
Memory corruption while using alignments for memory allocation.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 3 March 2026. US federal agencies were required to remediate it by 24 March 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 1.3%, which is higher than 70.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2026-21385 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-21385.
What does CVE-2026-21385 affect?
CVE-2026-21385 affects Qualcomm Multiple Chipsets. Memory corruption while using alignments for memory allocation.
How severe is CVE-2026-21385?
CVE-2026-21385 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 1.3%, higher than 70.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 24 March 2026.
How should organisations respond to CVE-2026-21385?
Apply the vendor patch for Qualcomm Multiple Chipsets as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.