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CVE-2021-1931

MediumPublished

Possible buffer overflow due to improper validation of buffer length while processing fast boot commands in Snapdragon Auto, Snapdragon Compute, Snapdragon...

Published: Jul 13, 2021
Updated: Aug 3, 2024
Assigning CNA: qualcomm
Evidence observed: Aug 8, 2026

Primary CVSS

6.7/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 13.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Possible buffer overflow due to improper validation of buffer length while processing fast boot commands in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music

Sources

xperia_5_bl_unlocker_pocPoC
My take on unlocking Xperia 5 SO-01M for p42 bootloader using CVE-2021-1931
CVE-2021-1931-BBRY-KEY2PoC
proof of concept CVE-2021-1931 exploit for the blackberry key2 (le) that allows to flash unsigned images temporarily

Responsible use

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