Use-After-Free Vulnerability in Linux Kernel Affecting Netfilter
CVE-2026-23392

Currently unrated

Key Information:

Vendor: Linux
Status: Linux
Vendor: CVE Published:; 25 March 2026

What is CVE-2026-23392?

The Linux kernel contains a vulnerability in the Netfilter subsystem related to flowtable management, allowing for a potential use-after-free condition. This issue arises when hooks are unregistered from the error path without properly synchronizing the reference counter. As a consequence, if the maximum number of hooks is reached or hardware offload setup fails, the flowtable may remain exposed to packet processing paths. The vulnerability has been acknowledged and resolved with an emphasis on performing necessary checks earlier in the flowtable management process to minimize the risk of exploitation.

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