CVE-2021-0089 Information disclosure in Intel(R) Processors

What is CVE-2021-0089?

CVE-2021-0089 is a medium-severity vulnerability in Debian Debian Linux, published on 9 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Observable response discrepancy in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.

Weakness: CWE-203

Which versions are affected by CVE-2021-0089?

It affects 7 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Intel Celeron Processors Firmware, Intel Core Processors Firmware, Intel Itanium Processors Firmware, Intel Pentium Processors Firmware and 1 more.

How do I fix CVE-2021-0089?

Apply the vendor's patch.

Is CVE-2021-0089 being exploited?

There is no known exploitation of CVE-2021-0089 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2021-0089, DEBIAN-CVE-2021-0089, GHSA-hhg2-c4p3-h55x, UBUNTU-CVE-2021-0089.