CVE-2022-33982

Severity: medium (CVSS 6.4 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: 2022-11-14 · updated 2026-06-17
Weakness: CWE-367

Description

DMA attacks on the parameter buffer used by the Int15ServiceSmm software SMI handler could lead to a TOCTOU attack on the SMI handler and lead to corruption of SMRAM. DMA attacks on the parameter buffer used by the software SMI handler used by the driver Int15ServiceSmm could lead to a TOCTOU attack on the SMI handler and lead to corruption of SMRAM. This issue was discovered by Insyde engineering during a security review. This issue is fixed in Kernel 5.2: 05.27.23, Kernel 5.3: 05.36.23, Kernel 5.4: 05.44.23 and Kernel 5.5: 05.52.23 CWE-367

Affected products

Insyde Kernel: from 5.2 before 5.2.05.27.23; from 5.3 before 5.3.05.36.23; from 5.4 before 5.4.05.44.23; from 5.5 before 5.5.05.52.23 — fixed in 5.2.05.27.23, 5.3.05.36.23, 5.4.05.44.23, 5.5.05.52.23

How to fix

Upgrade to a fixed version: Insyde Kernel 5.2.05.27.23, 5.3.05.36.23, 5.4.05.44.23, 5.5.05.52.23. Check the vendor advisory for mitigations.

References

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