CVE-2021-40009 Memory corruption in EMUI
An out-of-bounds write in the Always-On Display module of Huawei smartphones can compromise service integrity, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-40009?
CVE-2021-40009 is a medium-severity memory corruption vulnerability in Huawei Emui, published on 7 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
There is an Out-of-bounds write vulnerability in the AOD module in smartphones. Successful exploitation of this vulnerability may affect service integrity.
Weakness: CWE-787
Which versions are affected by CVE-2021-40009?
It affects 3 products.
Products include Huawei Emui, Huawei Harmonyos, Huawei Magic Ui.
How do I fix CVE-2021-40009?
No fix has been published for CVE-2021-40009 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-40009 being exploited?
There is no known exploitation of CVE-2021-40009 in the wild and no public exploit code.
Other vulnerabilities in Huawei Emui
Sources
Also known as GHSA-75gf-g4gw-mqpm.