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USN-3652-1 Not scored

linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem vulnerability

Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory.

Exploit probability Not scored
Published May 22, 2018
Required by Not available
Last source change June 3, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:18.04:LTS linux

10 explicit affected versions

Ubuntu:18.04:LTS linux-aws

5 explicit affected versions

Ubuntu:18.04:LTS linux-azure

5 explicit affected versions

Ubuntu:18.04:LTS linux-gcp

4 explicit affected versions

Ubuntu:18.04:LTS linux-kvm

5 explicit affected versions

Ubuntu:18.04:LTS linux-oem

2 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities USN-3652-1

Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory.

View original source

05 / REFERENCES

Further evidence