CVE-2023-33063 — 315 5g Iot Modem Firmware
HIGHCVE-2023-33063 is a high-severity (CVSS 7.8) Use After Free vulnerability in qualcomm 315 5g iot modem firmware. It is in CISA's Known Exploited Vulnerabilities catalog (added 2023-12-05) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
Memory corruption in DSP Services during a remote call from HLOS to DSP.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2023-12-05. Federal agencies were required to remediate by 2023-12-26.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2023-33063.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2023-33063 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
Memory corruption in DSP Services during a remote call from HLOS to DSP.
Affected Products
315 5g iot modem firmwarequalcommapq8017 firmwarequalcommaqt1000 firmwarequalcommar8031 firmwarequalcommar8035 firmwarequalcommar9380 firmwarequalcommResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Memory corruption in DSP Services during a remote call from HLOS to DSP.
Memory corruption in DSP Services during a remote call from HLOS to DSP.
Memory corruption in DSP Services during a remote call from HLOS to DSP.
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every qualcomm 315 5g iot modem firmware deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2023-33063 yet — track the qualcomm 315 5g iot modem firmware advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2023-33063 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.