# CVE-2026-49314: Huawei HarmonyOS out-of-bounds write in rendering and composition

Source: https://junglewise.ai/threats/cve-2026-49314-huawei-harmonyos-out-of-bounds-write-in-rendering-and-composition  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-09. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-49314 · Severity: high · CVSS 7.3 · Published 2026-09-09

An out-of-bounds memory write vulnerability in Huawei's HarmonyOS rendering and composition module could allow an attacker to crash the device or potentially execute arbitrary code. This affects the core graphics display system used by all HarmonyOS devices. Successful exploitation could render the device unavailable or unstable.

Technologies: [Huawei Harmonyos](https://junglewise.ai/threats/technologies/harmonyos). Vendors: [Huawei](https://junglewise.ai/threats/vendors/huawei).

## Quick answers

**Is CVE-2026-49314 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49314 being exploited in the wild.

**How severe is CVE-2026-49314?** High severity, with a CVSS score of 7.3, published 9 September 2026.

**Which products and versions are affected?** Huawei Harmonyos 6.1.0.

**Is there a fix for CVE-2026-49314?** A patch was published on 2026-09. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-49314 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-49314?** Check whether you run Huawei Harmonyos at an affected version. 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

CVE-2026-49314 is an out-of-bounds (OOB) write vulnerability in the rendering and composition module of Huawei HarmonyOS. The vulnerability exists in the core graphics rendering system responsible for composing and displaying content on the screen. An attacker can exploit this flaw to write data beyond allocated buffer boundaries, potentially causing a denial of service or, in certain conditions, arbitrary code execution. The attack vector and specific preconditions are not detailed in the advisory, though such vulnerabilities typically require local access or a malicious application. Huawei released security patches in September 2026 addressing this issue in HarmonyOS 6.1.0.

## Affected products

- Huawei HarmonyOS 6.1.0

## Timeline

- 2026-09-09: disclosed
- 2026-09: patched

## References

- [https://consumer.huawei.com/en/support/bulletin/2026/9/](https://consumer.huawei.com/en/support/bulletin/2026/9/)
- [https://consumer.huawei.com/en/support/bulletinlaptops/2026/9/](https://consumer.huawei.com/en/support/bulletinlaptops/2026/9/)

## Related threats

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- [Huawei HarmonyOS DoS vulnerability in window module](https://junglewise.ai/threats/cve-2026-101186-dos-vulnerability-in-the-window-module-impact-successful)
- [Huawei HarmonyOS peripheral module out-of-bounds read](https://junglewise.ai/threats/cve-2026-101185-oob-read-vulnerability-in-the-peripheral-module-impact)
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