### [CVE-2021-1920](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1920)
![](https://img.shields.io/static/v1?label=Product&message=Snapdragon%20Auto%2C%20Snapdragon%20Compute%2C%20Snapdragon%20Connectivity%2C%20Snapdragon%20Consumer%20IOT%2C%20Snapdragon%20Industrial%20IOT%2C%20Snapdragon%20IoT%2C%20Snapdragon%20Voice%20%26%20Music%2C%20Snapdragon%20Wearables&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=APQ8009%2C%20APQ8009W%2C%20APQ8017%2C%20APQ8037%2C%20APQ8084%2C%20APQ8096AU%2C%20AQT1000%2C%20AR6003%2C%20CSR6030%2C%20CSRB31024%2C%20MDM8207%2C%20MDM8215%2C%20MDM8215M%2C%20MDM8615M%2C%20MDM9150%2C%20MDM9205%2C%20MDM9206%2C%20MDM9207%2C%20MDM9215%2C%20MDM9230%2C%20MDM9250%2C%20MDM9310%2C%20MDM9330%2C%20MDM9607%2C%20MDM9615%2C%20MDM9615M%2C%20MDM9625%2C%20MDM9628%2C%20MDM9630%2C%20MDM9635M%2C%20MDM9640%2C%20MDM9645%2C%20MDM9650%2C%20MDM9655%2C%20MSM8108%2C%20MSM8208%2C%20MSM8209%2C%20MSM8608%2C%20MSM8909W%2C%20MSM8917%2C%20MSM8920%2C%20MSM8937%2C%20MSM8940%2C%20MSM8976%2C%20MSM8976SG%2C%20MSM8996AU%2C%20QCA1990%2C%20QCA4004%2C%20QCA6174%2C%20QCA6174A%2C%20QCA6310%2C%20QCA6320%2C%20QCA6335%2C%20QCA6390%2C%20QCA6391%2C%20QCA6420%2C%20QCA6421%2C%20QCA6426%2C%20QCA6430%2C%20QCA6431%2C%20QCA6436%2C%20QCA6564A%2C%20QCA6564AU%2C%20QCA6574%2C%20QCA6574A%2C%20QCA6574AU%2C%20QCA6584%2C%20QCA6584AU%2C%20QCA6595AU%2C%20QCA6694%2C%20QCA6694AU%2C%20QCA6696%2C%20QCA9367%2C%20QCA9377%2C%20QCA9379%2C%20QCM4290%2C%20QCM6125%2C%20QCS410%2C%20QCS4290%2C%20QCS603%2C%20QCS605%2C%20QCS610%2C%20QCS6125%2C%20QCX315%2C%20QSW8573%2C%20Qualcomm215%2C%20SA415M%2C%20SA515M%2C%20SA8155%2C%20SA8155P%2C%20SC8180X%2BSDX55%2C%20SD%20455%2C%20SD%20636%2C%20SD%20675%2C%20SD%208C%2C%20SD%208CX%2C%20SD205%2C%20SD210%2C%20SD429%2C%20SD439%2C%20SD450%2C%20SD480%2C%20SD632%2C%20SD665%2C%20SD670%2C%20SD675%2C%20SD678%2C%20SD690%205G%2C%20SD712%2C%20SD720G%2C%20SD730%2C%20SD750G%2C%20SD765%20...%5Btruncated*%5D%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Integer%20Underflow%20in%20Data%20Modem&color=brightgreen)

### Description

Integer underflow can occur due to improper handling of incoming RTCP packets in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables

### POC

#### Reference
- https://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin

#### Github
No PoCs found on GitHub currently.