CVE-2026-64078

netfilter: x_tables: add and use xtables_unregister_table_exit

HIGH
7.8
CVSS Score
Published: July 19, 2026 at 03:39 PM UTC
Updated: September 3, 2026 at 02:44 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%

Description

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().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.15 ≤ v < 6.18.345.15 ≤ v < 7.0.115.15 ≤ v < 7.16.19 ≤ v < 7.0.117.1 rc17.1 rc27.1 rc3fdacd57c79b79a03c7ca88f706ad9fb7b46831c1
Vendor states this is fixed in 8026e5163cca1d1db436c7bfb89ddea8b5e8c2cf (fixed)
Vendor states this is fixed in 86ee5bc9c0f0e652e19f395675a432de11b75514 (fixed)
Vendor states this is fixed in b4597d5fd7d2f8cebfffd40dffb5e003cc78964c (fixed)
Vendor states this is fixed in 5.15 (unaffected)
Vendor states this is fixed in 6.18.34 (unaffected)
Vendor states this is fixed in 7.0.11 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-noinfo

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