kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets

A flaw was found in the Linux kernel's netfilter component. This vulnerability occurs because the eui64mt6 function, which processes IPv6 packets, does not properly validate the MAC header for all packets. Specifically, packets with a zero fragment offset could bypass an existing guard, allowing...

netfilter: ip6t_eui64: reject invalid MAC header for all packets

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CVE-2026-31685 netfilter: ip6t_eui64: reject invalid MAC header for all packets

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects ...

PT-2026-35145

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the netfilter component where the eui64 mt6 function derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source...

Linux Distros Unpatched Vulnerability : CVE-2026-31685

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-64 from the Ethernet source address and compares it with the low...