CVE-2023-22615: insyde insydeh2o Out-of-bounds Write
CVSS: 8.4v3.1HighModified
Published 11-04-2023Last modified 11-02-2025
Vulnerability summary
CVE-2023-22615 is a high (CVSS 8.4) Out-of-bounds Write vulnerability in insyde insydeh2o. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.8% of scored vulnerabilities.
CVSS score
8.4/10
010
High · v3.1 (CVE.org)EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-04-2023PublishedVulnerability first disclosed.
- 11-02-2025Last modifiedVulnerability information updated.
Description
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. IHISI subfunction execution may corrupt SMRAM. An attacker can pass an address in the RCX save state register that overlaps SMRAM, thereby coercing an IHISI subfunction handler to overwrite private SMRAM.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:HSourcesAll 2 agree
- NVDNIST8.4HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
0.00 pp
From 0.20% on 21-09-2026
21-09-202621-10-2026
EPSS score0.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Insyde1 product
- insydeh2o05.37.03 | 05.45.01 | 05.53.01
1 vendor · 1 product
References
2 links- www.insyde.com/security-pledgeVendor Advisory
- www.insyde.com/security-pledge/SA-2023021Vendor Advisory