Use After Free in Qualcomm Fastconnect 7800

CVE-2025-21436

Memory corruption may occur while initiating two IOCTL calls simultaneously to create processes from two different threads.

Vulnerability class: Use-After-Free

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-21436: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-21436?
CVE-2025-21436 is a high-severity vulnerability in Qualcomm Fastconnect 7800, classified under Use After Free. CVSS score: 7.8/10. Published 2025-04-07.
How severe is CVE-2025-21436?
High severity. CVSS v3 base score is 7.8 out of 10.