Missing System x Flash Memory Write Protection Lock Bit
Published Nov 16, 2018
4.9
MEDIUMCVSS 3.0
EPSS 0.66%
Description
A write protection lock bit was left unset after boot on an older generation of Lenovo and IBM System x servers, potentially allowing an attacker with administrator access to modify the subset of flash memory containing Intel Server Platform Services (SPS) and the system Flash Descriptors.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<varies
- Version
-
- Version unspecifiedStatusaffectedConstraints<varies
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| IBM | System x UEFI | n/a |
| ||||||
| Lenovo | System x UEFI | n/a |
|
Configuration 1
- < a3e122b
Running on/with
- n/a
Configuration 2
- < cge122b
Running on/with
- n/a
Configuration 3
- < a5e124b
Running on/with
- n/a
Configuration 4
- < tke160c
Running on/with
- hs23
Configuration 5
- < ahe160c
Running on/with
- hs23e
Configuration 6
- < kse158c
Running on/with
- n/a
Configuration 7
- < cce160c
Running on/with
- n/a
Configuration 8
- < ahe160c
Running on/with
- n/a
Configuration 9
- < n3e132w
Running on/with
- n/a
Configuration 10
- < cne162d
Running on/with
- n/a
Configuration 11
- < n3e132w
Running on/with
- n/a
Configuration 12
- < n2e130e
Running on/with
- n/a
Configuration 13
- < fhe120d
Running on/with
- n/a
Configuration 14
- < fhe120d
Running on/with
- n/a
Configuration 15
- < jqe184c
Running on/with
- n/a
Configuration 16
- < j9e134c
Running on/with
- n/a
Configuration 17
- < jqe184c
Running on/with
- n/a
Configuration 18
- < jue134c
Running on/with
- n/a
Configuration 19
- < yae156c
Running on/with
- n/a
Configuration 20
- < y5e158c
Running on/with
- n/a
Configuration 21
- < bee164c
Running on/with
- n/a
Configuration 22
- < d7e166d
Running on/with
- n/a
Configuration 23
- < vve162c
Running on/with
- n/a
Configuration 24
- < vve160c
Running on/with
- n/a
Configuration 25
- < vve160c
Running on/with
- n/a
Configuration 26
- < vve160c
Running on/with
- n/a
Configuration 27
- < koe160c
Running on/with
- n/a
Configuration 28
- < a8e128c
Running on/with
- n/a
Configuration 29
- < bee164c
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Update UEFI firmware
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:L/Au:S/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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.66% (0.00664) | 49.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.67% (0.00670) | 46.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.14% (0.00137) | 31.07th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.05% (0.00050) | 20.99th | v3 (v2023.03.01) |
| Jun 11, 2024 | 0.05% (0.00050) | 19.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00050) | 17.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.19% (0.03195) | 65.26th | v1 |
| Jan 6, 2022 | 3.19% (0.03195) | 64.93th | v1 |
| Sep 1, 2021 | 3.19% (0.03195) | 81.37th | v1 |
| Apr 14, 2021 | 3.19% (0.03195) | 0.00th | v1 |
References (1)
- https://support.lenovo.com/us/en/solutions/LEN-24477 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://support.lenovo.com/us/en/solutions/LEN-24477 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.