Vulnerability in Insyde Insydeh2o
CVE-2022-36338
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver FwBlockServiceSmm, creating SMM, leads to arbitrary code execution. An attacker can replace the pointer to the UEFI boot service GetVariable with a pointer to malware, and then generate a software SMI.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
References
- www.insyde.com/security-pledge (Vendor Advisory)
- binarly.io/advisories/BRLY-2022-017/index.html (Exploit, Third Party Advisory)
- www.insyde.com/security-pledge/SA-2022029 (Vendor Advisory)
Frequently asked questions
- What is CVE-2022-36338?
- CVE-2022-36338 is a high-severity vulnerability in Insyde Insydeh2o. CVSS score: 8.2/10. Published 2022-09-23.
- How severe is CVE-2022-36338?
- High severity. CVSS v3 base score is 8.2 out of 10.