What is CVE-2022-32477?

CVE-2022-32477 is a high-severity vulnerability in Insyde Insydeh2o, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2023-02-15.

How severe is CVE-2022-32477?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Insyde Insydeh2o

CVE-2022-32477

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the FvbServicesRuntimeDxe shared 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 using IOMMU protection for the ACPI runtime memory used for the command buffer. This attack can be mitigated by copying the firmware block services data to SMRAM before checking it.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.001 (3.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Insyde Insydeh2o
N/a — versions n/a

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

cve@mitre.org (Vendor Advisory)
cve@mitre.org (Vendor Advisory)

Frequently asked questions

What is CVE-2022-32477?: CVE-2022-32477 is a high-severity vulnerability in Insyde Insydeh2o, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2023-02-15.
How severe is CVE-2022-32477?: High severity. CVSS v3 base score is 7.0 out of 10.