# CVE-2023-3006: linux: A known cache speculation vulnerability, known as Branch History Injection (BHI) or Spectre-BHB, becomes actual again...

CVE-2023-3006 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-3006, released May 31, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-3006
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 31, 2023

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.7-1 | [DEBIAN-CVE-2023-3006](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3006.md) | May 31, 2023 |
| Linux | linux Debian 13.5 (trixie) | 6.0.7-1 | [DEBIAN-CVE-2023-3006](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3006.md) | May 31, 2023 |
| Linux | linux Debian 14 | 6.0.7-1 | [DEBIAN-CVE-2023-3006](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3006.md) | May 31, 2023 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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