CVE-2023-33063: Qualcomm Multiple Chipsets Use-After-Free Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 5 Dec 2023, the same day the CVE record was published.

How likely is exploitation in the next 30 days?

0.7%

EPSS score, percentile 51.9 of all scored records

How severe?

7.8 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA deadline 26 Dec 2023. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

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

Which versions are affected?

Affected

• 315 5G IoT Modem
• APQ8017
• AQT1000
• AR8031
• AR8035
• AR9380

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: 26 December 2023.

Advisories and patches

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

Linked from CISA's catalog entry

• https://git.codelinaro.org/clo/la/kernel/msm-5.15/-/commit/2643808ddbedfaabbb334741873fb2857f78188a
• https://git.codelinaro.org/clo/la/kernel/msm-4.14/-/commit/d43222efda5a01c9804d74a541e3c1be9b7fe110
• https://nvd.nist.gov/vuln/detail/CVE-2023-33063

Affected products and versions

As listed in the CVE record.

Versions not listed are: unaffected.

And 269 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 use-after-free vulnerability due to memory corruption in DSP Services during a remote call from HLOS to DSP.

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

• CISA added CVE-2023-33063 to its Known Exploited Vulnerabilities (KEV) catalog on 5 Dec 2023.
• 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 26 Dec 2023.
• The CVE record was published on 5 Dec 2023, the same day 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 0.7% (percentile 51.9), 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

Use After Free in DSP Services

Memory corruption in DSP Services during a remote call from HLOS to DSP.

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

Weakness

• CWE-416: Use After Free

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

Timeline

References

• qualcomm.com

More exploited Qualcomm vulnerabilities

• CVE-2026-21385: Qualcomm Multiple Chipsets Memory Corruption Vulnerability (added 3 Mar 2026)
• 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)