What is CVE-2022-32250?

CVE-2022-32250 is a high-severity vulnerability affecting the Linux kernel's netfilter subsystem, which can be exploited for privilege escalation to root access on Linux-based systems. This use-after-free write vulnerability is related to the failure to remove an expression from a set's bindings list before destroying the expression. As a result, attackers can potentially gain unauthorized access and control over affected systems, posing a significant risk to organizations and users relying on these systems.

Who is impacted by this?

It impacts Linux kernel versions up to and including 5.18.1, as well as the latest Linux master and Ubuntu 22.04 Linux kernel 5.15.0-27-generic. This vulnerability poses a risk to users and organizations relying on these systems, as it can be exploited for privilege escalation to root access.

What should I do if I’m affected?

If you're affected by the CVE-2022-32250 vulnerability, it's crucial to take action to protect your system. To mitigate this issue, follow these simple steps:

1. Update your Linux kernel to the latest version that includes the fix for this vulnerability.

2. Regularly apply security updates and patches to your system to prevent future vulnerabilities.

Is this in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2022-32250 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This high-severity issue in the Linux kernel's netfilter subsystem can be exploited for privilege escalation to root access. To protect your system, update your Linux kernel to the latest version with the fix and regularly apply security updates and patches.

Weakness Enumeration

The weakness enumeration for this vulnerability is categorized as CWE-416, which is a Use After Free issue in the Linux kernel's netfilter subsystem.

Learn More

For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and affected software configurations, refer to the NVD page and the sources listed below.

• Salvatore Bonaccorso's discussion on oss-security

• Linux kernel: Netfilter heap buffer overflow discussion on oss-security