CVE-2025-21455

HIGH

Qualcomm Fastconnect 6800 Firmware - TOCTOU Race Condition

Title source: rule

Memory corruption while submitting blob data to kernel space though IOCTL.

CVSS v3 7.8

EPSS 0.0002

EPSS Percentile 4.6%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

CWE

CWE-367

Status published

Products (29)

qualcomm/fastconnect_6800_firmware

qualcomm/fastconnect_6900_firmware

qualcomm/fastconnect_7800_firmware

qualcomm/qca6391_firmware

qualcomm/qca6426_firmware

qualcomm/qca6436_firmware

qualcomm/qsm8250_firmware

qualcomm/sd865_5g_firmware

qualcomm/sdx55_firmware

qualcomm/snapdragon_865\+_5g_mobile_platform_\(sm8250-ab\)_firmware

... and 19 more

Published Aug 06, 2025

Tracked Since Feb 18, 2026