CVE-2026-21381 Buffer Over-read in WLAN Firmware
A buffer over-read in Qualcomm Snapdragon WLAN firmware allows transient denial of service when processing malformed service data frames.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21381?
CVE-2026-21381 is a high-severity denial of service vulnerability in Qualcomm Ar8035 Firmware, published on 6 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Transient DOS when receiving a service data frame with excessive length during device matching over a neighborhood awareness network protocol connection.
Weakness: CWE-126
Which versions are affected by CVE-2026-21381?
It affects 103 products.
Products include Qualcomm Ar8035 Firmware, Qualcomm Cologne Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware and 97 more.
How do I fix CVE-2026-21381?
No fix has been published for CVE-2026-21381 yet. Limit exposure of the affected software until one is available.
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-2026-21381 being exploited?
There is no known exploitation of CVE-2026-21381 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 GHSA-hvr6-7x95-4jgj.