CVE-2026-21385: Qualcomm Multiple Chipsets Memory Corruption Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 3 Mar 2026, 1 day after the CVE record was published.

How likely is exploitation in the next 30 days?

1.3%

EPSS score, percentile 70.7 of all scored records

How severe?

7.8 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA deadline 24 Mar 2026. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• 5G Fixed Wireless Access Platform
• APQ8098
• AR8031
• AR8035
• C-V2X 9150
• CSRA6620

and 6 more in the table below

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 24 March 2026.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://source.android.com/docs/security/bulletin/2026/2026-03-01
• https://nvd.nist.gov/vuln/detail/CVE-2026-21385

Affected products and versions

As listed in the CVE record.

Versions not listed are: unaffected.

And 223 more version entries in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Multiple Qualcomm chipsets contain a memory corruption vulnerability while using alignments for memory allocation.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2026-21385 to its Known Exploited Vulnerabilities (KEV) catalog on 3 Mar 2026.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 24 Mar 2026.
• The CVE record was published on 2 Mar 2026, 1 day before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 7.8 (High), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 1.3% (percentile 70.7), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Integer Overflow or Wraparound in Graphics

Memory corruption while using alignments for memory allocation.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-190: Integer Overflow or Wraparound

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• docs.qualcomm.com

More exploited Qualcomm vulnerabilities

• CVE-2025-21479: Qualcomm Multiple Chipsets Incorrect Authorization Vulnerability (added 3 Jun 2025)
• CVE-2025-21480: Qualcomm Multiple Chipsets Incorrect Authorization Vulnerability (added 3 Jun 2025)
• CVE-2025-27038: Qualcomm Multiple Chipsets Use-After-Free Vulnerability (added 3 Jun 2025)
• CVE-2024-43047: Qualcomm Multiple Chipsets Use-After-Free Vulnerability (added 8 Oct 2024)
• CVE-2022-22071: Qualcomm Multiple Chipsets Use-After-Free Vulnerability (added 5 Dec 2023)
• CVE-2023-33063: Qualcomm Multiple Chipsets Use-After-Free Vulnerability (added 5 Dec 2023)