CVE-2021-39977 Null dereference in HarmonyOS

What is CVE-2021-39977?

CVE-2021-39977 is a high-severity vulnerability in Huawei Harmonyos, published on 3 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The HwNearbyMain module has a NULL Pointer Dereference vulnerability.Successful exploitation of this vulnerability may cause a process to restart.

Weakness: CWE-476

Which versions are affected by CVE-2021-39977?

It affects 1 product.

Products include Huawei Harmonyos.

How do I fix CVE-2021-39977?

No fix has been published for CVE-2021-39977 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-39977 being exploited?

There is no known exploitation of CVE-2021-39977 in the wild and no public exploit code.

Other vulnerabilities in Huawei Harmonyos

• CVE-2026-34865 Memory corruption in HarmonyOS Critical 10.0
• CVE-2023-34157 Other in HarmonyOS Critical 10.0
• CVE-2023-41294 Denial of service in HarmonyOS Critical 9.8
• CVE-2022-48478 Denial of service in HarmonyOS Critical 9.8
• CVE-2022-48479 Memory corruption in HarmonyOS Critical 9.8

All Huawei Harmonyos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qcc4-gjx4-jhph.