High severity · published Feb 15, 2023
CVE-2022-32955
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5
7.0
CVSS
0.1%
EPSS
No
On KEV
Description
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the NvmExpressDxe buffer used by SMM and non-SMM code could cause TOCTOU race-condition issues that could lead to corruption of SMRAM and escalation of privileges. This attack can be mitigated by using IOMMU protection for the ACPI runtime memory used for the command buffer. This attack can be mitigated by copying the link data to SMRAM before checking it and verifying that all pointers are within the buffer.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
Insydeh2o · Insyde
5.0 before 5.2.05.27.27; 5.3 before 5.3.05.36.27; 5.4 before 5.4.05.44.27; 5.5 before 5.5.05.52.27 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-32955
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-32955
Vendor Advisory
https://www.insyde.com/security-pledge
Vendor Advisory
https://www.insyde.com/security-pledge/SA-2023015
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