CVE-2023-21636 Improper Validation of Array Index in Linux
An attacker can exploit improper array index validation in the Linux kernel to cause memory corruption, potentially leading to code execution or privilege escalation on Qualcomm Snapdragon devices.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-21636?
CVE-2023-21636 is a medium-severity memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 5 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Memory Corruption due to improper validation of array index in Linux while updating adn record.
Weakness: CWE-129
Which versions are affected by CVE-2023-21636?
It affects 51 products.
Products include Qualcomm Aqt1000 Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6420 Firmware, Qualcomm Qca6426 Firmware, Qualcomm Qca6430 Firmware and 45 more.
How do I fix CVE-2023-21636?
No fix has been published for CVE-2023-21636 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-2023-21636 being exploited?
There is no known exploitation of CVE-2023-21636 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-3f3w-4rvj-j62g.