CVE-2023-32233 is a high-severity vulnerability affecting the Linux kernel, specifically in the Netfilter nf\_tables component. This use-after-free vulnerability can be exploited by unprivileged local users to gain root privileges on affected systems. The issue impacts a wide range of Linux kernel versions, as well as specific versions of Red Hat Enterprise Linux and NetApp HCI Baseboard Management Controller. It's important for users to be aware of this vulnerability and take necessary precautions to secure their systems.

How do I know if I'm affected?

If you're using the Linux kernel, you might be affected by the vulnerability. This issue is present in certain versions of the Linux kernel and Red Hat Enterprise Linux. To know if you're affected, check the NVD page for the specific versions and ranges mentioned. Keep in mind that this vulnerability doesn't impact Apple products, so if you're using an Apple device, you're not affected by this issue.

What should I do if I'm affected?

If you're affected by the vulnerability, it's crucial to take action to secure your system. First, update your Linux kernel to the fixed version. Next, apply any available patches and disable unprivileged user namespaces if necessary. Keep your system updated and monitor for further developments. Remember, these steps are simplified for non-technical users, so consult the appropriate resources for detailed instructions.

Is this in CISA’s Known Exploited Vulnerabilities Catalog?

Yes, it is in CISA's Known Exploited Vulnerabilities Catalog. The vulnerability, known as the use-after-free in Netfilter nf_tables, was added on May 8, 2023, with a specific due date is not mentioned, the required action involves patching, mitigation, and following the provided advisories and solutions to secure your system against this high-severity issue.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as CWE-416, wherein the vulnerability involves a use-after-free issue in the Linux kernel's Netfilter component, which can lead to local privilege escalation.

For more details

CVE-2023-32233 is a significant vulnerability affecting the Linux kernel and various software configurations. To gain a deeper understanding of its description, severity, technical details, and known affected software configurations, refer to the NVD page or the links below.

• Kernel Live Patch Security Notice LSN-0095-1

• Linux kernel use-after-free in Netfilter, local privilege escalation discussion

• Red Hat Bugzilla – Bug 2196105

• [SECURITY] [DSA 5402-1] linux security update