How severe is CVE-2021-1906?

CVE-2021-1906 has a CVSS score of 6.2/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which products are affected by CVE-2021-1906?

CVE-2021-1906 affects the following products: qualcomm apq8009 firmware, qualcomm apq8009w firmware, qualcomm apq8017 firmware, qualcomm apq8053 firmware, qualcomm apq8064au firmware, qualcomm apq8096au firmware, qualcomm aqt1000 firmware, qualcomm ar8031 firmware, and 392 more.

How do I patch CVE-2021-1906?

No patch has shipped for CVE-2021-1906 yet — track the qualcomm apq8009 firmware advisory for a fixed release and apply the workarounds below in the meantime.

How do I detect CVE-2021-1906 across my infrastructure?

Inventory every qualcomm apq8009 firmware deployment and check each version against the affected-products list above.

How do I mitigate CVE-2021-1906 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Is CVE-2021-1906 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2021-1906, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2021-1906?

CVE-2021-1906 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 43th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2021-1906 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2021-1906 (Qualcomm Multiple Chipsets Detection of Error Condition Without Action Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03. CISA required all US federal civilian agencies to remediate this vulnerability by 2021-11-17. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Which products and versions are affected by CVE-2021-1906?

CVE-2021-1906 affects qualcomm apq8009 firmware; qualcomm apq8009w firmware; qualcomm apq8017 firmware; qualcomm apq8053 firmware, and 396 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2021-1906 published, and has it been updated?

CVE-2021-1906 was published on May 7, 2021 and was last updated on June 17, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

CISA KEV · ACTIVELY EXPLOITED

MEDIUM severity

CVE-2021-1906 — Apq8009 Firmware

MEDIUM

CVE-2021-1906 is a medium-severity (CVSS 6.2) vulnerability in qualcomm apq8009 firmware. It is in CISA's Known Exploited Vulnerabilities catalog (added 2021-11-03) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

Improper handling of address deregistration on failure can lead to new GPU address allocation failure. in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer…

Published

May 7, 2021

Updated

Jun 17, 2026

Affected

400 products

Patched

See advisory

Exploits

2 known

Exploitation data as of Oct 24, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2021-11-03. Federal agencies were required to remediate by 2021-11-17.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2021-1906.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs43th percentile — riskier than 43% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-1906 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Improper handling of address deregistration on failure can lead to new GPU address allocation failure. in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables

Affected Products

400 products · 401 configurations

apq8009 firmwarequalcomm

all

apq8009w firmwarequalcomm

all

apq8017 firmwarequalcomm

all

apq8053 firmwarequalcomm

all

apq8064au firmwarequalcomm

all

apq8096au firmwarequalcomm

all

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Improper handling of address deregistration on failure can lead to new G…

source.android.comGoogle-sheetNov 2020

Improper handling of address deregistration on failure can lead to new G…

cisa.govCISANov 2021

Detection & mitigation playbook

Vendor / appliance

Detect
Inventory every qualcomm apq8009 firmware deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2021-1906 yet — track the qualcomm apq8009 firmware advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

O3 Security · Runtime Protection

Is CVE-2021-1906 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works