# CVE-2023-21670: Improper Access control in GPU Subsystem

> An attacker can execute arbitrary commands in privileged mode via the GPU subsystem, leading to memory corruption and potential privilege escalation on Android devices.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Jun 2023
- **Updated:** 7 Jan 2025
- **Also known as:** 3425942, A-276750663, ASB-A-276750663, GHSA-w2x2-g32p-v8fp

## What is CVE-2023-21670?

CVE-2023-21670 is a high-severity memory corruption vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 6 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory Corruption in GPU Subsystem due to arbitrary command execution from GPU in privileged mode.

Weakness: CWE-863 (Incorrect Authorization), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2023-21670?

It affects 182 products.


Products: Qualcomm 315 5g Iot Modem Firmware, Qualcomm Aqt1000 Firmware, Qualcomm Ar8031 Firmware, Qualcomm Ar8035 Firmware, Qualcomm C-V2x9150 Firmware, Qualcomm Csra6620 Firmware, Qualcomm Csra6640 Firmware, Qualcomm Flight Rb5 5g Platform Firmware, Qualcomm Msm8905 Firmware, Qualcomm Qam8255p Firmware, Qualcomm Qam8295p Firmware, Qualcomm Qam8650p Firmware, Qualcomm Qam8775p Firmware, Qualcomm Qca6174a Firmware, Qualcomm Qca6310 Firmware, Qualcomm Qca6335 Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6420 Firmware, Qualcomm Qca6426 Firmware and 162 more.

## How do I fix CVE-2023-21670?

Apply the vendor's patch.

## Is CVE-2023-21670 being exploited?

There is no known exploitation of CVE-2023-21670 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm 315 5g Iot Modem Firmware

- [CVE-2023-33107](https://insights.sbomify.com/CVE-2023-33107/): Qualcomm Multiple Chipsets Integer Overflow (high 8.4, exploited in the wild)
- [CVE-2023-33063](https://insights.sbomify.com/CVE-2023-33063/): Qualcomm Multiple Chipsets Use-After-Free (high 7.8, exploited in the wild)
- [CVE-2025-27034](https://insights.sbomify.com/CVE-2025-27034/): Improper Validation of Array Index in Multi-Mode Call Processor (critical 9.8)
- [CVE-2023-22388](https://insights.sbomify.com/CVE-2023-22388/): Use of Out-of-range Pointer Offset in Multi-mode Call Processor (critical 9.8)
- [CVE-2023-28578](https://insights.sbomify.com/CVE-2023-28578/): Improper Input Validation in Services (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-21670 and fix it if it is affected.

What it is: CVE-2023-21670 is a high-severity memory corruption vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 6 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-21670 in the wild and no public exploit code.

Affected product: Qualcomm 315 5g Iot Modem Firmware. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-21670/ (Markdown: https://insights.sbomify.com/CVE-2023-21670/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-21670
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-21670
- OSV: https://osv.dev/vulnerability/CVE-2023-21670

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-21670/
Summaries are generated and may contain mistakes; the official description above is the record.