Buffer overflow in Insyde Insydeh2o
CVE-2021-41838
An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.
Vulnerability class: Buffer Overflow
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: 0.003 (23.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.insyde.com/security-pledge (Vendor Advisory)
- www.insyde.com/security-pledge/SA-2022023 (Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf (Third Party Advisory)
- security.netapp.com/advisory/ntap-20220222-0001/ (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2021-41838?
- CVE-2021-41838 is a high-severity vulnerability in Insyde Insydeh2o, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.2/10. Published 2022-02-03.
- How severe is CVE-2021-41838?
- High severity. CVSS v3 base score is 8.2 out of 10.