CVE-2025-21435 Buffer Over-read in WLAN Host Communication
A buffer over-read in Qualcomm WLAN host communication allows attackers to cause a transient denial of service via crafted beacon frames.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-21435?
CVE-2025-21435 is a high-severity denial of service vulnerability in Qualcomm Ar8035 Firmware, published on 7 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Transient DOS may occur while parsing extended IE in beacon.
Weakness: CWE-126
Which versions are affected by CVE-2025-21435?
It affects 149 products.
Products include Qualcomm Ar8035 Firmware, Qualcomm Csr8811 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Immersive Home 214 Platform Firmware and 143 more.
How do I fix CVE-2025-21435?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-21435 being exploited?
There is no known exploitation of CVE-2025-21435 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 3924648, A-388047607, ASB-A-388047607, GHSA-4q5q-cfpq-3h3j.