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.
Published 2019-04-10 17:29:00
Updated 2020-08-24 17:37:01
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2019-6156

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-6156

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
2.1
LOW AV:L/AC:L/Au:N/C:N/I:P/A:N
3.9
2.9
NIST
3.3
LOW CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
1.8
1.4
NIST

CWE ids for CVE-2019-6156

  • The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-6156

Products affected by CVE-2019-6156

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