CVE-2023-28577 Multiple Dmabuf Kernel Address UAF Vulnerability

Medium 6.7 Published 8 Aug 2023 Updated 2 Aug 2024

A race condition in Qualcomm Snapdragon drivers allows attackers to trigger a use-after-free, potentially leading to code execution or privilege escalation.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2023-28577?

CVE-2023-28577 is a medium-severity use after free vulnerability in Qualcomm Fastconnect 6800 Firmware, published on 8 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the function call related to CAM_REQ_MGR_RELEASE_BUF there is no check if the buffer is being used. So when a function called cam_mem_get_cpu_buf to get the kernel va to use, another thread can call CAM_REQ_MGR_RELEASE_BUF to unmap the kernel va which cause UAF of the kernel address.

Weakness: CWE-416

Which versions are affected by CVE-2023-28577?

It affects 31 products.

Products include Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6426 Firmware, Qualcomm Qca6436 Firmware and 25 more.

How do I fix CVE-2023-28577?

Apply the vendor's patch.

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-2023-28577 being exploited?

There is no known exploitation of CVE-2023-28577 in the wild and no public exploit code.

All Qualcomm Fastconnect 6800 Firmware vulnerabilities

Sources

Also known as 3489559, A-283319714, GHSA-rjh6-h795-3mrj, PUB-A-283319714.