CVE-2021-1956 Denial of service in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music

Medium 6.5 Published 9 Sep 2021 Updated 3 Aug 2024

Improper handling of Bluetooth packets allows attackers to disrupt piconet connectivity in various Qualcomm Snapdragon devices.

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-2021-1956?

CVE-2021-1956 is a medium-severity denial of service vulnerability in Qualcomm Aqt1000 Firmware, published on 9 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music

Which versions are affected by CVE-2021-1956?

It affects 42 products.

Products include Qualcomm Aqt1000 Firmware, Qualcomm Ar8035 Firmware, Qualcomm Csrb31024 Firmware, Qualcomm Qca6175a Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware and 36 more.

How do I fix CVE-2021-1956?

No fix has been published for CVE-2021-1956 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-2021-1956 being exploited?

There is no known exploitation of CVE-2021-1956 in the wild and no public exploit code.

All Qualcomm Aqt1000 Firmware vulnerabilities

Sources

Also known as GHSA-w32f-37w4-xj86.