CVE-2023-39198 Kernel: qxl: race condition leading to use-after-free in qxl_mode_dumb_create()

What is CVE-2023-39198?

CVE-2023-39198 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 9 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A race condition was found in the QXL driver in the Linux kernel. The qxl_mode_dumb_create() function dereferences the qobj returned by the qxl_gem_object_create_with_handle(), but the handle is the only one holding a reference to it. This flaw allows an attacker to guess the returned handle value and trigger a use-after-free issue, potentially leading to a denial of service or privilege escalation.

Weakness: CWE-416

Which versions are affected by CVE-2023-39198?

It affects 3 products.

Products include Fedoraproject Fedora, Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2023-39198?

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-2023-39198 being exploited?

There is no known exploitation of CVE-2023-39198 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as AZL-31957, BELL-CVE-2023-39198, DEBIAN-CVE-2023-39198, GHSA-qhp7-446p-xq88, UBUNTU-CVE-2023-39198.