CVE-2023-21635 Buffer Copy without Checking Size of Input in Data Network Stack & Connectivity
Memory corruption in Qualcomm Snapdragon data network stack allows attackers to execute arbitrary code or escalate privileges via telephony detection.
- 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-2023-21635?
CVE-2023-21635 is a medium-severity memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 4 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Memory Corruption in Data Network Stack & Connectivity when sim gets detected on telephony.
Which versions are affected by CVE-2023-21635?
It affects 49 products.
Products include Qualcomm Aqt1000 Firmware, Qualcomm Csrb31024 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Qca6391 Firmware and 43 more.
How do I fix CVE-2023-21635?
No fix has been published for CVE-2023-21635 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-2023-21635 being exploited?
There is no known exploitation of CVE-2023-21635 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-3pfh-89x5-83xr.