CVE-2023-4133 Kernel: cxgb4: use-after-free in ch_flower_stats_cb()

What is CVE-2023-4133?

CVE-2023-4133 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 3 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free vulnerability was found in the cxgb4 driver in the Linux kernel. The bug occurs when the cxgb4 device is detaching due to a possible rearming of the flower_stats_timer from the work queue. This flaw allows a local user to crash the system, causing a denial of service condition.

Weakness: CWE-416

Which versions are affected by CVE-2023-4133?

It affects 3 products.

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

How do I fix CVE-2023-4133?

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-2023-4133 being exploited?

There is no known exploitation of CVE-2023-4133 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as AZL-27853, DEBIAN-CVE-2023-4133, GHSA-w3j7-w57f-mrwq, ROOT-OS-DEBIAN-11-CVE-2023-4133, ROOT-OS-DEBIAN-12-CVE-2023-4133, ROOT-OS-UBUNTU-2204-CVE-2023-4133 and 1 more.