CVE-2022-31243

low-risk
Published 2022-11-15

Update description and links DMA transactions which are targeted at input buffers used for the software SMI handler used by the FvbServicesRuntimeDxe driver could cause SMRAM corruption through a TOCTOU attack.. "DMA transactions which are targeted at input buffers used for the software SMI handler used by the FvbServicesRuntimeDxe driver could cause SMRAM corruption. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. Fixed in Kernel 5.2: 05.27.21. Kernel 5.3: 05.36.21. Kernel 5.4: 05.44.21. Kernel 5.5: 05.52.21 https://www.insyde.com/security-pledge/SA-2022044

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.4/10 Medium
LOCAL / HIGH complexity

Affected Products (1)

Affected Vendors

Insyde

References (6)

https://cert-portal.siemens.com/productcert/pdf/ssa-450613.pdf
Vendor Advisory https://www.insyde.com/security-pledge
Vendor Advisory https://www.insyde.com/security-pledge/SA-2022044
https://cert-portal.siemens.com/productcert/pdf/ssa-450613.pdf
Vendor Advisory https://www.insyde.com/security-pledge
Vendor Advisory https://www.insyde.com/security-pledge/SA-2022044
22
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal