Vulnerability in Linux
CVE-2023-4515
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate command request size In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except for SMB2_OPLOCK_BREAK_HE command, the request size of other commands is not checked, it's not expected. Fix it by add check for request size of other commands.
EPSS: 0.001 (4.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Linux — versions 5.15.121, 6.3.10, 6.4.11
- Linux Linux_kernel — versions 6.4, 6.5
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2023-4515?
- CVE-2023-4515 is a critical-severity vulnerability in Linux. CVSS score: 9.1/10. Published 2025-08-16.
- How severe is CVE-2023-4515?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2023-4515 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.