SB2025051947 - Indirect branch predictor vulnerability in Intel processors

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2024-43420)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to shared microarchitectural predictor state that influences transient execution. A local user can gain access to sensitive information.

2) Information disclosure (CVE-ID: CVE-2025-20623)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to shared microarchitectural predictor state that influences transient execution. A local user can gain access to sensitive information.

3) Information disclosure (CVE-ID: CVE-2024-45332)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to shared microarchitectural predictor state that influences transient execution. A local user can gain access to sensitive information.

Remediation

Install update from vendor's website.

References

• https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01247.html
• http://www.openwall.com/lists/oss-security/2025/05/13/7
• https://comsec.ethz.ch/research/microarch/branch-privilege-injection/