K000163171: Linux kernel netfilter vulnerability CVE-2026-53000

🗓️ 02 Sep 2026 06:30:25Reported by f5Type

f5🔗 my.f5.com👁 5 Views

Linux kernel netfilter nat ops not freed via kfree_rcu in register error path.

Reporter	Title	Published	Views	Family All 58
ATTACKERKB	CVE-2026-53000	24 Jun 202616:29	–	attackerkb
Tenable Nessus	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1866)	22 Jun 202600:00	–	nessus
Tenable Nessus	openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21555-1)	13 Aug 202600:00	–	nessus
Tenable Nessus	RHEL 10 : kernel (RHSA-2026:55445)	17 Aug 202600:00	–	nessus
Tenable Nessus	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:3790-1)	27 Aug 202600:00	–	nessus
Tenable Nessus	Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (NVIDIA) vulnerabilities (USN-8663-1)	26 Aug 202600:00	–	nessus
Tenable Nessus	Ubuntu 26.04 LTS : Linux kernel (NVIDIA BaseOS) vulnerabilities (USN-8664-1)	26 Aug 202600:00	–	nessus
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-53000	25 Jun 202600:00	–	nessus
BDU FSTEC	Vulnerabilities of functions ipt_nat_register_lookups(), ipt_nat_unregister_lookups() in the module net/ipv4/netfilter/iptable_nat.c, functions ip6t_nat_register_lookups(), ip6t_nat_unregister_lookups() in the module net/ipv6/netfilter/ip6table_nat.c, functions nf_nat_register_fn(), nf_nat_unregister_fn() in the module net/netfilter/nf_nat_core.c of the Linux operating system, which allow attackers to compromise the confidentiality, integrity, and accessibility of protected information.	4 Sep 202600:00	–	bdu_fstec
CVE	CVE-2026-53000	24 Jun 202616:29	–	cve

02 Sep 2026 06:30Current

5.9Medium risk

Vulners AI Score5.9

CVSS 3.17.8

EPSS0.00129

Linux kernel netfilter nat kfree_rcu deferred release nf_nat_register_fn F5 not affected