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Critical USN-8730-1 1 CVE

linux, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-intel-iot-realtime, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-realtime vulnerability

Published Sep 7, 2026 · Updated Oct 8, 2026

Ecosystem: Ubuntu

Summary

A security issue was discovered in the Linux kernel.
An attacker could possibly use this to compromise the system.
This update corrects flaws in the following subsystems:
- IPv6 networking;
- Netfilter;

Fixed packages 15

ReleasePackageFixed in
Ubuntu · 22.04 LTS 22.04:LTS linux 5.15.0-191.201
Ubuntu · 22.04 LTS 22.04:LTS linux-gcp 5.15.0-1115.125
Ubuntu · 22.04 LTS 22.04:LTS linux-gke 5.15.0-1111.117
Ubuntu · 22.04 LTS 22.04:LTS linux-gkeop 5.15.0-1098.106
Ubuntu · 22.04 LTS 22.04:LTS linux-ibm 5.15.0-1109.113
Ubuntu · 22.04 LTS 22.04:LTS linux-lowlatency 5.15.0-191.201
Ubuntu · 22.04 LTS 22.04:LTS linux-nvidia 5.15.0-1110.111
Ubuntu · 22.04 LTS 22.04:LTS linux-nvidia-tegra 5.15.0-1067.69
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS linux-hwe-5.15 5.15.0-191.201~20.04.1
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS linux-ibm-5.15 5.15.0-1109.113~20.04.1
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS linux-lowlatency-hwe-5.15 5.15.0-191.201~20.04.1
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS linux-nvidia-tegra-5.15 5.15.0-1067.69~20.04.1
Ubuntu · Pro FIPS-updates 22.04 LTS Pro:FIPS-updates:22.04:LTS linux-gcp-fips 5.15.0-1115.125+fips1
Ubuntu · Pro Realtime 22.04 LTS Pro:Realtime:22.04:LTS linux-intel-iot-realtime 5.15.0-1107.109
Ubuntu · Pro Realtime 22.04 LTS Pro:Realtime:22.04:LTS linux-realtime 5.15.0-1114.123

Vulnerabilities 1

  • Critical 9.4
    CVE-2026-53131

    netfilter: require Ethernet MAC header before using eth_hdr()

    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)`…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • report
    https://ubuntu.com/security/CVE-2026-53131