CVE-2020-8341

In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash

published September 1, 2020

CVSS
—
EPSS
0%
Percentile
27.1
In the wild
Unconfirmed
What it is

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). After resuming from S3 sleep mode in various versions of BIOS for some Lenovo ThinkPad systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00347 · 27.1th percentile
Published
2020-09-01T21:30Z
EPSS history
Timeline
  • 01 SEP 21:30Z
    In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash
    cvelistv5