What’s Vulnerable › Vulnerabilities

CVE-2023-47252

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-26 · updated 2026-06-17
• Weakness: CWE-787

Description

An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45.

Affected products

• Insyde Kernel: from 5.2 before 5.28.45; from 5.3 before 5.37.45; from 5.4 before 5.45.45; from 5.5 before 5.53.45; from 5.6 before 5.60.45 — fixed in 5.28.45, 5.37.45, 5.45.45, 5.53.45, 5.60.45

How to fix

Upgrade to a fixed version: Insyde Kernel 5.28.45, 5.37.45, 5.45.45, 5.53.45. Check the vendor advisory for mitigations.

References

• https://www.insyde.com/security-pledge/SA-2023067
• https://www.insyde.com/security-pledge/SA-2023067

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