CVE-2023-43538 Buffer Copy Without Checking Size of Input (`Classic Buffer Overflow`) in TZ Secure OS
A buffer overflow in Qualcomm's TZ Secure OS allows attackers to execute arbitrary code or escalate privileges during initialization.
- 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-2023-43538?
CVE-2023-43538 is a critical memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 3 Jun 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Memory corruption in TZ Secure OS while Tunnel Invoke Manager initialization.
Weakness: CWE-120
Which versions are affected by CVE-2023-43538?
It affects 137 products.
Products include Qualcomm Aqt1000 Firmware, Qualcomm Ar8035 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware and 131 more.
How do I fix CVE-2023-43538?
No fix has been published for CVE-2023-43538 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-2023-43538 being exploited?
There is no known exploitation of CVE-2023-43538 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-m5g4-gchp-vpxf.