# CVE-2026-21383: Reusing a Nonce, Key Pair in Encryption in HLOS

> Reusing nonces in AES-GCM key wrapping within Qualcomm Snapdragon HLOS allows attackers to compromise cryptographic security and potentially access protected data.

- **Severity:** High 7.1 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **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:** No
- **Published:** 6 Jul 2026
- **Updated:** 8 Jul 2026
- **Also known as:** GHSA-3p8m-mr3f-jqg6

## What is CVE-2026-21383?

CVE-2026-21383 is a high-severity vulnerability in Qualcomm Fastconnect 6900 Firmware, published on 6 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Cryptographic Issue when using a static initialization vector for AES-GCM key wrapping, which requires a unique value for each call to ensure security.

Weakness: CWE-323 (Reusing a Nonce, Key Pair in Encryption)

## Which versions are affected by CVE-2026-21383?

It affects 53 products.


Products: Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Lemans Au Lgit Firmware, Qualcomm Lemansau Firmware, Qualcomm Pandeiro Firmware, Qualcomm Qam8255p Firmware, Qualcomm Qam8397p Firmware, Qualcomm Qam8797p Firmware, Qualcomm Qamsrv1h Firmware, Qualcomm Qamsrv1m Firmware, Qualcomm Qca6595au Firmware, Qualcomm Qca6696 Firmware, Qualcomm Qca6698aq Firmware, Qualcomm Qca6797aq Firmware, Qualcomm Qca8695au Firmware, Qualcomm Qdu1000 Firmware, Qualcomm Qdu1110 Firmware, Qualcomm Qdu1210 Firmware, Qualcomm Qdx1010 Firmware, Qualcomm Qdx1011 Firmware and 33 more.

## How do I fix CVE-2026-21383?

No fix has been published for CVE-2026-21383 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21383 being exploited?

There is no known exploitation of CVE-2026-21383 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Fastconnect 6900 Firmware

- [CVE-2024-38399](https://insights.sbomify.com/CVE-2024-38399/): Use After Free in Graphics (high 8.4)
- [CVE-2024-21472](https://insights.sbomify.com/CVE-2024-21472/): Use After Free in Kernel (high 8.4)
- [CVE-2025-47405](https://insights.sbomify.com/CVE-2025-47405/): Untrusted Pointer Dereference in Camera (high 7.8)
- [CVE-2025-47358](https://insights.sbomify.com/CVE-2025-47358/): Use After Free in Secure Processor (high 7.8)
- [CVE-2025-47350](https://insights.sbomify.com/CVE-2025-47350/): Use After Free in DSP Service (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21383 and fix it if it is affected.

What it is: CVE-2026-21383 is a high-severity vulnerability in Qualcomm Fastconnect 6900 Firmware, published on 6 Jul 2026. 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-2026-21383 in the wild and no public exploit code.

Affected product: Qualcomm Fastconnect 6900 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-2026-21383/ (Markdown: https://insights.sbomify.com/CVE-2026-21383/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21383
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21383
- OSV: https://osv.dev/vulnerability/CVE-2026-21383

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-21383/
Summaries are generated and may contain mistakes; the official description above is the record.