What is CVE-2021-1905?

CVE-2021-1905 is a high-severity vulnerability in Qualcomm Apq8009, classified under Use After Free. CVSS score: 8.4/10. Published 2021-05-07.

How severe is CVE-2021-1905?

High severity. CVSS v3 base score is 8.4 out of 10.

Is CVE-2021-1905 known to be exploited?

Yes. CVE-2021-1905 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 31 public proof-of-concept repositories are indexed.

Use After Free in Qualcomm Apq8009

CVE-2021-1905

Possible use after free due to improper handling of memory mapping of multiple processes simultaneously. in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables

Vulnerability class: Use-After-Free

Published 2021-05-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (74.6th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.qualcomm.com/company/product-security/bulletins/may-2021-bulletin (Patch, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-1905?: CVE-2021-1905 is a high-severity vulnerability in Qualcomm Apq8009, classified under Use After Free. CVSS score: 8.4/10. Published 2021-05-07.
How severe is CVE-2021-1905?: High severity. CVSS v3 base score is 8.4 out of 10.
Is CVE-2021-1905 known to be exploited?: Yes. CVE-2021-1905 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 31 public proof-of-concept repositories are indexed.