Out-of-bounds Read in Linux
CVE-2023-3865
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bound read in smb2_write ksmbd_smb2_check_message doesn't validate hdr->NextCommand. If ->NextCommand is bigger than Offset + Length of smb2 write, It will allow oversized smb2 write length. It will cause OOB read in smb2_write.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Linux — versions 5.15.121, 6.3.10, 0626e6641f6b467447c81dd7678a69c66f7746cf
- Linux Linux_kernel — versions 6.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2023-3865?
- CVE-2023-3865 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2025-08-16.
- How severe is CVE-2023-3865?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2023-3865 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.