CVE-2022-34403 Memory corruption in CPG BIOS

High 7.5 Published 1 Feb 2023 Updated 26 Mar 2025

A local authenticated attacker can exploit a stack buffer overflow in Dell BIOS to execute arbitrary code in SMRAM.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-34403?

CVE-2022-34403 is a high-severity memory corruption vulnerability in Dell Inspiron 3891 Firmware, published on 1 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Dell BIOS contains a Stack based buffer overflow vulnerability. A local authenticated attacker could potentially exploit this vulnerability by using an SMI to send larger than expected input to a parameter to gain arbitrary code execution in SMRAM.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2022-34403?

It affects 83 products.

Products include Dell Alienware M15 R6 Firmware, Dell Alienware M15 R7 Firmware, Dell Alienware M15 Ryzen Edition R5 Firmware, Dell Alienware M17 R5 Amd Firmware, Dell G15 5510 Firmware, Dell G15 5511 Firmware and 77 more.

How do I fix CVE-2022-34403?

No fix has been published for CVE-2022-34403 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-2022-34403 being exploited?

There is no known exploitation of CVE-2022-34403 in the wild and no public exploit code.

All Dell Inspiron 3891 Firmware vulnerabilities

Sources

Also known as GHSA-f4vh-w8qv-cvrw.