CVE-2026-53131

CriticalCVSS 9.4/10Last modified Oct 19, 2026

Description

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

netfilter: require Ethernet MAC header before using eth_hdr()

`ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`.

Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing `eth_hdr(skb)`.

Metrics

CVSS 3.1 9.4/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

Weakness enumeration

CWE-125

Affected software

No affected versions have been published.

Timeline

Published
Jun 25, 2026
Last modified
Oct 19, 2026
NVD status
Modified

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CVE-2026-53131: Critical severity, CVSS 9.4 | Vulnix