CVE-2025-21485 Time-of-check Time-of-use (TOCTOU) Race Condition in DSP Service
A race condition in Qualcomm Snapdragon DSP allows memory corruption and potential code execution via malicious IOCTL calls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-21485?
CVE-2025-21485 is a high-severity vulnerability in Qualcomm Fastconnect 6900 Firmware, published on 3 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Memory corruption while processing INIT and multimode invoke IOCTL calls on FastRPC.
Weakness: CWE-367
Which versions are affected by CVE-2025-21485?
It affects 29 products.
Products include Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qmp1000 Firmware, Qualcomm Sm8735 Firmware, Qualcomm Sm8750 Firmware, Qualcomm Sm8750p Firmware and 23 more.
How do I fix CVE-2025-21485?
Apply the vendor's patch.
Is CVE-2025-21485 being exploited?
There is no known exploitation of CVE-2025-21485 in the wild and no public exploit code.
Other vulnerabilities in Qualcomm Fastconnect 6900 Firmware
Sources
Also known as 3947112, A-409047090, ASB-A-409047090, GHSA-w5w3-37x5-78hg.