AI Threat Alert
CVE-2020-27339
AWAITING NVDIn the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and...
Full CISO analysis pending enrichment.
What systems are affected?
| Package | Ecosystem | Vulnerable Range | Patched |
|---|---|---|---|
| n/a | — | — | No patch |
Do you use n/a? You're affected.
How severe is it?
What should I do?
No patch available
Monitor for updates. Consider compensating controls or temporary mitigations.
Which compliance frameworks are affected?
Compliance analysis pending. Sign in for full compliance mapping when available.
Frequently Asked Questions
What is CVE-2020-27339?
In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).
Is CVE-2020-27339 actively exploited?
No confirmed active exploitation of CVE-2020-27339 has been reported, but organizations should still patch proactively.
How to fix CVE-2020-27339?
No patch is currently available. Monitor vendor advisories for updates.
What is the CVSS score for CVE-2020-27339?
No CVSS score has been assigned yet.
What are the technical details?
Original Advisory
In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).
References
- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf x_refsource_CONFIRM
- security.netapp.com/advisory/ntap-20220216-0005/ x_refsource_CONFIRM
- insyde.com/security-pledge/SA-2021001 x_refsource_MISC