CVE-2026-43026

A flaw was found in the Linux kernel's netfilter component, specifically within the ctnetlink module. This vulnerability occurs because certain fields are not properly initialized when a new connection tracking expectation is created without the Network Address Translation (NAT) expectation attribute. This oversight can lead to the disclosure of stale data from previously used memory, which a local user could potentially access. This information disclosure could expose sensitive data from the kernel to an unprivileged user.

This Moderate-severity flaw in the Linux kernel's netfilter component allows a local attacker to disclose stale kernel memory. Uninitialized fields within connection tracking expectations, when the Network Address Translation (NAT) attribute is not present, can expose sensitive data to an unprivileged local user.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.