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OpenAdvisories
High USN-8659-1 1 CVE

linux, linux-aws, linux-aws-7.0, linux-ibm, linux-oem-7.0, linux-raspi, linux-realtime vulnerability

Published Aug 20, 2026 · Updated Aug 21, 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:
- Open vSwitch;

Fixed packages 7

ReleasePackageFixed in
Ubuntu · 24.04 LTS 24.04:LTS linux-aws-7.0 7.0.0-1011.11~24.04.1
Ubuntu · 26.04 LTS 26.04:LTS linux 7.0.0-30.30
Ubuntu · 26.04 LTS 26.04:LTS linux-aws 7.0.0-1011.11
Ubuntu · 26.04 LTS 26.04:LTS linux-ibm 7.0.0-1012.12
Ubuntu · 26.04 LTS 26.04:LTS linux-oem-7.0 7.0.0-1011.11
Ubuntu · 26.04 LTS 26.04:LTS linux-raspi 7.0.0-1017.17
Ubuntu · 26.04 LTS 26.04:LTS linux-realtime 7.0.0-30.30.1

Vulnerabilities 1

  • High 7.8
    CVE-2026-64531 Public exploit

    net: openvswitch: reject oversized nested action attrs

    In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16. Commit a1e64addf3ff ("net: openvswitch: remove misbeh…

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

References

  • report
    https://ubuntu.com/security/CVE-2026-64531