CVE-2025-21456 Use After Free in NPU
Concurrent buffer mapping in Qualcomm Snapdragon NPU allows use-after-free, potentially enabling code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-21456?
CVE-2025-21456 is a high-severity use after free vulnerability in Qualcomm Ar8035 Firmware, published on 6 Aug 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 IOCTL command when multiple threads are called to map/unmap buffer concurrently.
Weakness: CWE-416
Which versions are affected by CVE-2025-21456?
It affects 64 products.
Products include Qualcomm Ar8035 Firmware, Qualcomm C-V2x 9150 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qam8255p Firmware, Qualcomm Qam8295p Firmware and 58 more.
How do I fix CVE-2025-21456?
No fix has been published for CVE-2025-21456 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-21456 being exploited?
There is no known exploitation of CVE-2025-21456 in the wild and no public exploit code.
Other vulnerabilities in Qualcomm Ar8035 Firmware
- CVE-2023-33106 Qualcomm Multiple Chipsets Use of Out-of-Range Pointer Offset
- CVE-2024-45569 Improper Validation of Array Index in WLAN Host Communication
- CVE-2024-21473 Improper Input Validation in WIN SON
- CVE-2023-28582 Buffer Copy Without Checking Size of Input in Data Modem
- CVE-2023-43552 Use After Free in WLAN Host Communication
Sources
Also known as GHSA-vv64-cx48-gwwp.