CVE-2021-34403 Use after free in SHIELD TV

High 7.8 Published 18 Jan 2022 Updated 4 Aug 2024

Local attackers can exploit a use-after-free in nvmap ioctl to escalate privileges, compromise data, or cause denial of service on NVIDIA Linux systems.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-34403?

CVE-2021-34403 is a high-severity use after free vulnerability in NVIDIA SHIELD TV, published on 18 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

NVIDIA Linux distributions contain a vulnerability in nvmap ioctl, which allows any user with a local account to exploit a use-after-free condition, leading to code privilege escalation, loss of confidentiality and integrity, or denial of service.

Weakness: CWE-416

Which versions are affected by CVE-2021-34403?

It affects 1 product.

Products include Nvidia Shield Experience.

How do I fix CVE-2021-34403?

No fix has been published for CVE-2021-34403 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-2021-34403 being exploited?

There is no known exploitation of CVE-2021-34403 in the wild and no public exploit code.

Sources

Also known as GHSA-5xrh-mp7v-54g6.