CVE-2023-39192 Kernel: netfilter: xtables out-of-bounds read in u32_match_it()

What is CVE-2023-39192?

CVE-2023-39192 is a medium-severity vulnerability in Fedoraproject Fedora, published on 9 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

Weakness: CWE-125

Which versions are affected by CVE-2023-39192?

It affects 3 products.

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

How do I fix CVE-2023-39192?

Apply the vendor's patch.

Is CVE-2023-39192 being exploited?

There is no known exploitation of CVE-2023-39192 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-31266, BELL-CVE-2023-39192, DEBIAN-CVE-2023-39192, GHSA-r9hc-hfrh-p2p9, UBUNTU-CVE-2023-39192.