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OpenAdvisories
Critical USN-8730-3 1 CVE

linux-azure-5.15, linux-azure-fde-5.15, linux-azure-fips vulnerability

Published Sep 18, 2026 · Updated Sep 18, 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 3

ReleasePackageFixed in
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS linux-azure-5.15 5.15.0-1121.130~20.04.1
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS linux-azure-fde-5.15 5.15.0-1120.129~20.04.1
Ubuntu · Pro FIPS-updates 22.04 LTS Pro:FIPS-updates:22.04:LTS linux-azure-fips 5.15.0-1121.130+fips1

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