In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: fix unaligned memory access in timestamp adjustment Use get_unaligned_be32() and put_unaligned_be32() to safely read and write the timestamp fields. This prevents performance degradation due to unaligned memory access or even a crash on strict alignment architectures. This follows the implementation of timestamp parsing in the networking stack at tcp_parse_options() and synproxy_parse_options().

ubuntu_linux USN-8888-1: Ubuntu 26.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8888-1)

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: fix unaligned
    memory access in timestamp adjustment Use get_unaligned_be32() and put_unaligned_be32() to safely read and
    write the timestamp fields. This prevents performance degradation due to unaligned memory access or even a
    crash on strict alignment architectures. This follows the implementation of timestamp parsing in the
    networking stack at tcp_parse_options() and synproxy_parse_options(). (CVE-2026-80637)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - netfilter: synproxy: fix unaligned memory access in timestamp adjustment Use get_unaligned_be32() and     put_unaligned_be32() to safely read and write the timestamp fields. This prevents performance degradation     due to unaligned memory access or even a crash on strict alignment architectures. This follows the     implementation of timestamp parsing in the networking stack at tcp_parse_options() and     synproxy_parse_options(). (CVE-2026-80637)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
470660	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.21	Tenable Cloud Security	Google COS Security Checks	Local	high
470660	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.21	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
470223	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.448.8	Tenable Cloud Security	Google COS Security Checks	Local	high
470223	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.448.8	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
469040	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6: security update to 19216.655.6	Tenable Cloud Security	Google COS Security Checks	Local	high
469040	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6: security update to 19216.655.6	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
341880	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-2071)	Nessus	Amazon Linux Local Security Checks	Local	high
341334	Linux Distros Unpatched Vulnerability : CVE-2026-80637	Nessus	Misc.	Local	high
337239	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-2057)	Nessus	Amazon Linux Local Security Checks	Local	high

Detections

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CVE-2026-80637

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