# CVE-2021-1905: Qualcomm Multiple Chipsets Use-After-Free Vulnerability

Source: https://junglewise.ai/threats/cve-2021-1905-qualcomm-multiple-chipsets-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-1905 · Severity: critical · CVSS 8.4 · Exploited in the wild · Published 2021-11-03

A use-after-free vulnerability exists in multiple Qualcomm Snapdragon chipsets due to improper handling of memory mapping when multiple processes are handled simultaneously. This flaw could allow a local attacker to potentially gain elevated privileges or cause a system crash.

Technologies: [Qualcomm Multiple Chipsets](https://junglewise.ai/threats/technologies/multiple-chipsets). Vendors: [Qualcomm](https://junglewise.ai/threats/vendors/qualcomm).

## Quick answers

**Is CVE-2021-1905 exploited in the wild?** Yes. CVE-2021-1905 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2021-1905?** Critical severity, with a CVSS score of 8.4, published 3 November 2021.

**Which products and versions are affected?** Qualcomm Snapdragon Auto; Qualcomm Snapdragon Compute; Qualcomm Snapdragon Connectivity; Qualcomm Snapdragon Consumer IOT; and 6 more.

**Is there a fix for CVE-2021-1905?** A patch was published on 2021-05-01: Qualcomm released a security bulletin in May 2021 addressing the issue. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2021-1905 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2021-1905?** Check whether you run Qualcomm Multiple Chipsets. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Qualcomm Snapdragon Auto
- Qualcomm Snapdragon Compute
- Qualcomm Snapdragon Connectivity
- Qualcomm Snapdragon Consumer IOT
- Qualcomm Snapdragon Industrial IOT
- Qualcomm Snapdragon Mobile
- Qualcomm Snapdragon Voice & Music
- Qualcomm Snapdragon Wearables
- Qualcomm APQ8009 Firmware -
- Qualcomm APQ8009W Firmware -

## Timeline

- 2021-05-01: patched: Qualcomm released a security bulletin in May 2021 addressing the issue.
- 2021-11-03: disclosed: NVD publication date.
- 2021-11-03: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog.
- 2021-11-03: exploited: Confirmed as exploited in the wild per CISA and advisory metadata.

## Related threats

- [Qualcomm Multiple Chipsets memory corruption in memory allocation](https://junglewise.ai/threats/cve-2026-21385-qualcomm-multiple-chipsets-memory-corruption-in-memory-allocation)
- [Qualcomm Adreno GPU driver use-after-free vulnerability](https://junglewise.ai/threats/cve-2025-27038-qualcomm-adreno-gpu-driver-use-after-free-vulnerability)
- [Qualcomm Multiple Chipsets incorrect authorization in GPU micronode](https://junglewise.ai/threats/cve-2025-21479-qualcomm-multiple-chipsets-incorrect-authorization-in-gpu)
- [Qualcomm Multiple Chipsets incorrect authorization in GPU micronode](https://junglewise.ai/threats/cve-2025-21480-qualcomm-multiple-chipsets-incorrect-authorization-in-gpu)
- [Qualcomm Multiple Chipsets Use-After-Free Vulnerability](https://junglewise.ai/threats/cve-2024-43047-qualcomm-multiple-chipsets-use-after-free-vulnerability)