CVE-2026-34856 Use after free in HarmonyOS
A use-after-free vulnerability in the HarmonyOS communication module allows attackers to cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34856?
CVE-2026-34856 is a high-severity use after free vulnerability in Huawei Harmonyos, published on 13 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
UAF vulnerability in the communication module. Impact: Successful exploitation of this vulnerability may affect availability.
Weakness: CWE-362
Which versions are affected by CVE-2026-34856?
It affects 1 product.
Products include Huawei Harmonyos.
How do I fix CVE-2026-34856?
No fix has been published for CVE-2026-34856 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-34856 being exploited?
There is no known exploitation of CVE-2026-34856 in the wild and no public exploit code.
Other vulnerabilities in Huawei Harmonyos
Sources
Also known as GHSA-pvgc-rj6v-rx44.