Critical (9.1). EPSS 3.2% chance of exploitation in the next 30 days.
An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/smb2pdu.c in ksmbd does not properly check the UserName value because it does not consider the address of security buffer, leading to an out-of-bounds read.
Severity
CVSS 3.1
9.1 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS
3.2% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)