# CVE-2026-34859: Huawei HarmonyOS and EMUI Use-After-Free in kernel module

Source: https://junglewise.ai/threats/cve-2026-34859-huawei-harmonyos-and-emui-use-after-free-in-kernel-module  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-13. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2026-34859 · Severity: medium · CVSS 5.9 · Published 2026-04-13

A security vulnerability exists in the core software (kernel) of Huawei smartphones, tablets, and smart screens. If exploited, this could allow an attacker to crash the device or gain unauthorized access to sensitive information. Users should apply the April 2026 security updates to protect their devices.

## Quick answers

**Is CVE-2026-34859 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34859 being exploited in the wild.

**How severe is CVE-2026-34859?** Medium severity, with a CVSS score of 5.9, published 13 April 2026.

**Which products and versions are affected?** Huawei HarmonyOS 4.2.0, 4.3.0; Huawei EMUI 14.2.0, 15.0.0.

**Is there a fix for CVE-2026-34859?** A patch was published on 2026-04-08: Huawei released security bulletin updates. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-34859 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-34859?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Use-After-Free (UAF) vulnerability (CWE-416) exists within the kernel module of Huawei's HarmonyOS and EMUI operating systems. The flaw is triggered when the system continues to use a memory pointer after it has been freed, which can be exploited by a local attacker with low privileges. Successful exploitation allows the attacker to compromise system confidentiality and availability, potentially leading to arbitrary code execution or a denial-of-service (DoS) condition. The vulnerability was addressed in the April 2026 security bulletin.

## Affected products

- Huawei HarmonyOS 4.2.0, 4.3.0
- Huawei EMUI 14.2.0, 15.0.0

## Timeline

- 2026-04-08: patched: Huawei released security bulletin updates.
- 2026-04-13: disclosed: Initial CVE publication.
- 2026-04-15: advisory: NVD updated with NIST analysis and CVSS scoring.

## References

- [https://consumer.huawei.com/en/support/bulletin/2026/4/](https://consumer.huawei.com/en/support/bulletin/2026/4/)
- [https://consumer.huawei.com/en/support/bulletinvision/2026/4/](https://consumer.huawei.com/en/support/bulletinvision/2026/4/)