VULNERABILITY INTELLIGENCE

CVE-2019-6156

CVSS score3.3 LOW
EPSS probability0.24%
CISA KEVNot currently listed
Published2019-04-10
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Description

In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). Lenovo was notified that after resuming from S3 sleep mode in various versions of BIOS for Lenovo systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.

Weakness classification

  • CWE-667: Improper Locking

Primary references