What’s Vulnerable › Vulnerabilities

CVE-2024-42269: netfilter: iptables: Fix potential null-ptr-deref in ip6table_nat_table_init().

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-17 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: iptables: Fix potential null-ptr-deref in ip6table_nat_table_init(). ip6table_nat_table_init() accesses net->gen->ptr[ip6table_nat_net_ops.id], but the function is exposed to user space before the entry is allocated via register_pernet_subsys(). Let's call register_pernet_subsys() before xt_register_template().

Affected products

• Linux kernel: from 5.15 before 6.1.104; from 6.2 before 6.6.45; from 6.7 before 6.10.4; 6.11-rc1 — fixed in 6.1.104, 6.10.4, 6.6.45

How to fix

Upgrade to a fixed version: Linux kernel 6.1.104, 6.10.4, 6.6.45. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/419ee6274c5153b89c4393c1946faa4c3cad4f9e
• https://git.kernel.org/stable/c/87dba44e9471b79b255d0736858a897332db9226
• https://git.kernel.org/stable/c/91b6df6611b7edb28676c4f63f90c56c30d3e601
• https://git.kernel.org/stable/c/c22921df777de5606f1047b1345b8d22ef1c0b34
• https://git.kernel.org/stable/c/e85b9b6a87be4cb3710082038b677e97f2389003
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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