CVE-2023-3006 Information disclosure in Kernel

What is CVE-2023-3006?

CVE-2023-3006 is a medium-severity vulnerability in Linux kernel, published on 31 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A known cache speculation vulnerability, known as Branch History Injection (BHI) or Spectre-BHB, becomes actual again for the new hw AmpereOne. Spectre-BHB is similar to Spectre v2, except that malicious code uses the shared branch history (stored in the CPU Branch History Buffer, or BHB) to influence mispredicted branches within the victim's hardware context. Once that occurs, speculation caused by the mispredicted branches can cause cache allocation. This issue leads to obtaining information that should not be accessible.

Weakness: CWE-212, CWE-226

Which versions are affected by CVE-2023-3006?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-3006?

Apply the vendor's patch.

Is CVE-2023-3006 being exploited?

There is no known exploitation of CVE-2023-3006 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2023-3006, GHSA-px79-jx9m-m5h5, UBUNTU-CVE-2023-3006.