CVE-2022-4574

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-30 · updated 2026-06-17
Weakness: CWE-20

Description

An SMI handler input validation vulnerability in the BIOS of some ThinkPad models could allow an attacker with local access and elevated privileges to execute arbitrary code.

Affected products

Lenovo Thinkpad L14 Firmware: before 1.20 — fixed in 1.20
Lenovo Thinkpad L14 Gen 2 Firmware: all versions
Lenovo Thinkpad L15 Firmware: before 1.20 — fixed in 1.20
Lenovo Thinkpad L15 Gen 2 Firmware: all versions
Lenovo Thinkpad P14S Gen 1 Firmware: before 1.28 — fixed in 1.28
Lenovo Thinkpad P14S Gen 2 Firmware: all versions
Lenovo Thinkpad P14S Gen 3 Firmware: before 1.31 — fixed in 1.31
Lenovo Thinkpad P15 Gen 1 Firmware: before 1.32 — fixed in 1.32
Lenovo Thinkpad P15 Gen 2 Firmware: before 1.25 — fixed in 1.25
Lenovo Thinkpad P15S Gen 1 Firmware: before 1.28 — fixed in 1.28
Lenovo Thinkpad P15S Gen 2 Firmware: all versions
Lenovo Thinkpad P15V Gen 1 Firmware: before 1.32 — fixed in 1.32
Lenovo Thinkpad P15V Gen 2 Firmware: before 1.19 — fixed in 1.19
Lenovo Thinkpad P15V Gen 3 Firmware: before 1.15 — fixed in 1.15
Lenovo Thinkpad P16 Gen 1 Firmware: before 1.17 — fixed in 1.17
Lenovo Thinkpad P16S Gen 1 Firmware: before 1.31 — fixed in 1.31
Lenovo Thinkpad P17 Gen 1 Firmware: before 1.32 — fixed in 1.32
Lenovo Thinkpad P17 Gen 2 Firmware: before 1.25 — fixed in 1.25
Lenovo Thinkpad P1 Gen 3 Firmware: before 1.27 — fixed in 1.27
Lenovo Thinkpad P1 Gen 4 Firmware: 1.22
Lenovo Thinkpad P1 Gen 5 Firmware: before 1.16 — fixed in 1.16
Lenovo Thinkpad T14 Gen 1 Firmware: before 1.28 — fixed in 1.28
Lenovo Thinkpad T14 Gen 2 Firmware: all versions
Lenovo Thinkpad T14 Gen 3 Firmware: before 1.31 — fixed in 1.31
Lenovo Thinkpad T14S Firmware: before 1.26 — fixed in 1.26
Lenovo Thinkpad T14S Gen 2 Firmware: before 1.51 — fixed in 1.51
Lenovo Thinkpad T14S Gen 3 Firmware: before 1.33 — fixed in 1.33
Lenovo Thinkpad T15 Gen 2 Firmware: all versions
Lenovo Thinkpad T15G Gen 1 Firmware: before 1.32 — fixed in 1.32
Lenovo Thinkpad T15G Gen 2 Firmware: before 1.25 — fixed in 1.25

How to fix

Upgrade to a fixed version: Lenovo Thinkpad L14 Firmware 1.20; Lenovo Thinkpad L15 Firmware 1.20; Lenovo Thinkpad P14S Gen 1 Firmware 1.28; Lenovo Thinkpad P14S Gen 3 Firmware 1.31; Lenovo Thinkpad P15 Gen 1 Firmware 1.32; Lenovo Thinkpad P15 Gen 2 Firmware 1.25; Lenovo Thinkpad P15S Gen 1 Firmware 1.28; Lenovo Thinkpad P15V Gen 1 Firmware 1.32; Lenovo Thinkpad P15V Gen 2 Firmware 1.19; Lenovo Thinkpad P15V Gen 3 Firmware 1.15; Lenovo Thinkpad P16 Gen 1 Firmware 1.17; Lenovo Thinkpad P16S Gen 1 Firmware 1.31. Check the vendor advisory for mitigations.

References

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