CVE-2026-64078
kernel: netfilter: x_tables: add and use xtables_unregister_table_exit
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · October 26, 2026
Description
A flaw was found in the Linux kernel's netfilter x_tables component. This vulnerability occurs when a userspace process attempts to re-instantiate a netfilter table after the module has been removed. Due to an incomplete unregistration process, the table cannot be properly re-established, potentially leading to a denial of service for network filtering functionalities. This issue is resolved by ensuring a complete unregistration of the table.
CVSS score applicability
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
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.
CVSS / CWE
CVSS 3.1 · 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-459 · Incomplete Cleanup