CVE-2023-39189 Kernel: netfilter: nftables out-of-bounds read in nf_osf_match_one()

What is CVE-2023-39189?

CVE-2023-39189 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 nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.

Weakness: CWE-125

Which versions are affected by CVE-2023-39189?

It affects 3 products.

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

How do I fix CVE-2023-39189?

Apply the vendor's patch.

Is CVE-2023-39189 being exploited?

There is no known exploitation of CVE-2023-39189 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-31267, BELL-CVE-2023-39189, DEBIAN-CVE-2023-39189, GHSA-3rm2-4q4r-254r, UBUNTU-CVE-2023-39189.