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Vulnerability record · CVE-2026-53131 · published 25 June 2026

CVE-2026-53131: Linux kernel vulnerability

Linux · Linux Kernel

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)`.

9.4 CVSS 3.1 Critical EPSS 0.61% · top 53.0%
9.4CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
6 Jul 2026Last modified by NVD

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)`.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c Patch
https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9 Patch
https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743 Patch
https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d Patch
https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137 Patch
https://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570a Patch
https://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53131), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.