In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash
Published Sep 1, 2020
2.4
LOWCVSS 3.1
EPSS 0.35%
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). 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.
Affected products
-
- Version variousStatusaffectedConstraints-
- Version
Configuration 1
- < n2iet90w
Running on/with
- n/a
Configuration 2
- < n2iet90w
Running on/with
- n/a
Configuration 3
- < n2ret16w
Running on/with
- n/a
Configuration 4
- < n2jet89w
Running on/with
- n/a
Configuration 5
- < 2020-08-30
Running on/with
- n/a
Configuration 6
- < n2iet90w
Running on/with
- n/a
Configuration 7
- < n2het54w
Running on/with
- n/a
Configuration 8
- < n2het54w
Running on/with
- n/a
Configuration 9
- < n2jet89w
Running on/with
- n/a
Configuration 10
- < n2set18w
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
No action required. Lenovo has updated BIOS for systems in the product impact section to implement this secondary protection, PRx.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.35% (0.00347) | 25.94th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.35% (0.00347) | 28.40th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.06% (0.00058) | 25.44th | v3 (v2023.03.01) |
| Jun 11, 2024 | 0.06% (0.00058) | 24.80th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.06% (0.00058) | 22.77th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00050) | 17.61th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Jan 6, 2022 | 1.84% (0.01840) | 47.32th | v1 |
| Jan 5, 2022 | 0.42% (0.00416) | 26.65th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
No CWE recorded.
References (1)
- https://support.lenovo.com/us/en/product_security/LEN-30042 x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://support.lenovo.com/us/en/product_security/LEN-30042 | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.