Executive brief
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.
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