Vulnerability knowledge base
Applying security updates in a timely manner is critical to reducing risks, especially with high-impact vulnerabilities. Canonical releases Ubuntu Security Notices whenever a security fix is available for an official Ubuntu package.
When high-profile vulnerabilities are publicly disclosed, the Ubuntu security team also provides in-depth technical explanations and mitigation guidance in the form of vulnerability knowledge base articles.
Recent vulnerabilities
2026
Several vulnerabilities were discovered in AppArmor which could lead to denial of service, kernel memory information leak, removing security controls, or local privilege escalation to root user.
2025
Issues were discovered in AMD, Intel, and Hygon CPUs that result in information disclosure to KVM virtual machine guests under mitigations for the Spectre Variant 2 vulnerability.
2024
A new variant of the previously-disclosed BHI (also known as Spectre v2) vulnerabilities was discovered to affected certain Intel CPUs. The new publication shows that attacks are possible using vectors other than eBPF, leading to...
Resources
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