CVE-2023-43540 Buffer Copy Without Checking Size of Input in Bluetooth HOST
A buffer overflow in Qualcomm Snapdragon Bluetooth firmware allows attackers to execute arbitrary code or escalate privileges via malicious HCI requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-43540?
CVE-2023-43540 is a high-severity memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 4 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Memory corruption while processing the IOCTL FM HCI WRITE request.
Which versions are affected by CVE-2023-43540?
It affects 29 products.
Products include Qualcomm Aqt1000 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware and 23 more.
How do I fix CVE-2023-43540?
No fix has been published for CVE-2023-43540 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-43540 being exploited?
There is no known exploitation of CVE-2023-43540 in the wild and no public exploit code.
Other vulnerabilities in Qualcomm Aqt1000 Firmware
- CVE-2025-21479 Qualcomm Multiple Chipsets Incorrect Authorization
- CVE-2025-21480 Qualcomm Multiple Chipsets Incorrect Authorization
- CVE-2023-28562 Buffer Copy Without Checking Size of Input in QESL
- CVE-2022-40514 Buffer copy without checking size of input in WLAN Firmware
- CVE-2022-22096 Memory corruption in Snapdragon Connectivity, Snapdragon Mobile
Sources
Also known as GHSA-6299-m9xc-vxvj.