PT-2026-61395 · Linux · Linux

CVE-2026-64078 · Published 2026-07-19 · Updated 2026-07-19

Mitre

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

In the Linux kernel, the following vulnerability has been resolved:

netfilter: x tables: add and use xtables unregister table exit

Previous change added xtables unregister table pre exit to detach the table from the packetpath and to unlink it from the active table list. In case of rmmod, userspace that is doing set/getsockopt for this table will not be able to re-instantiate the table:

1. The larval table has been removed already
2. existing instantiated table is no longer on the xt pernet table list.

This adds the second stage helper:

unlink the table from the dying list, free the hook ops (if any) and do the audit notification. It replaces xt unregister table().

Fix

Related Identifiers

CVE-2026-64078

Affected Products

Linux

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-64078 · Security Note
• https://git.kernel.org/stable/c/8026e5163cca1d1db436c7bfb89ddea8b5e8c2cf · Note
• https://git.kernel.org/stable/c/b4597d5fd7d2f8cebfffd40dffb5e003cc78964c · Note
• https://git.kernel.org/stable/c/86ee5bc9c0f0e652e19f395675a432de11b75514 · Note