Buffer overflow in Insyde Kernel
CVE-2023-47252
An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (4.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Insyde Kernel
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-47252?
- CVE-2023-47252 is a medium-severity vulnerability in Insyde Kernel, classified under Out-of-bounds Write. CVSS score: 6.3/10. Published 2024-04-26.
- How severe is CVE-2023-47252?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2023-47252 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.