CVE-2023-3006

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-31 · updated 2026-06-17
Weakness: CWE-226

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.

Affected products

Linux kernel: 6.1-rc1

References

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?id=0e5d5ae837c8
https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?id=0e5d5ae837c8

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