How severe is CVE-2021-1905?

CVE-2021-1905 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-1905 being actively exploited?

Yes. CVE-2021-1905 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-1905?

CVE-2021-1905 primarily affects Qualcomm Apq8009 Firmware. In total, 396 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-1905?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2021-1905 have an EU (EUVD) identifier?

Yes. CVE-2021-1905 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-7369. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2021-1905 published?

CVE-2021-1905 was published on 2021-05-07 and last updated on 2026-06-17.

CVE-2021-1905

CVE-2021-1905 is a high-severity vulnerability in Qualcomm Apq8009 Firmware with a CVSS 3.x base score of 8.4. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v2: 7.2
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2021-7369
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-416
Affected product: Qualcomm Apq8009 Firmware
Published: 2021-05-07
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is 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
How severe is CVE-2021-1905?: CVE-2021-1905 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-1905 being actively exploited?: Yes. CVE-2021-1905 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-1905?: CVE-2021-1905 primarily affects Qualcomm Apq8009 Firmware. In total, 396 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-1905?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2021-1905 have an EU (EUVD) identifier?: Yes. CVE-2021-1905 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-7369. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2021-1905 published?: CVE-2021-1905 was published on 2021-05-07 and last updated on 2026-06-17.

References

Affected products (396)

cpe:2.3:o:qualcomm:apq8009_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8009w_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8017_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8053_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8064au_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8096au_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:aqt1000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:ar8031_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:ar8151_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:csra6620_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:csra6640_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:fsm10055_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:fsm10056_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9206_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9607_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9626_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9628_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9650_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8909w_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8917_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8953_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8996au_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm215_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm3003a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm4125_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm4250_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm439_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm456_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm6125_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm6150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm6150a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm6150l_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm6250_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm6350_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm640a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm640l_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm640p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm660_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:pm660a_firmware:-:*:*:*:*:*:*:*

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