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.

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

EPSS: 0.001 (0.7th percentile) — read the EPSS interpretation.

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.

Affected products

Qualcomm Fastconnect_7800
Qualcomm Fastconnect_7800_firmware
Qualcomm Qmp1000
Qualcomm Qmp1000_firmware
Qualcomm Sm8735
Qualcomm Sm8735_firmware
Qualcomm Sm8750
Qualcomm Sm8750_firmware
Qualcomm Sm8750p
Qualcomm Sm8750p_firmware

Weakness classification (CWE)

CWE-416 — Use After Free

References

product-security@qualcomm.com (Vendor Advisory)

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.