SB20251230186 - Out-of-bounds read in Linux kernel ksmbd
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230186
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2023-54250)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the assemble_neg_contexts() and deassemble_neg_contexts() functions in fs/ksmbd/smb2pdu.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/39f5b4b313b445c980a2a295bed28228c29228ed
- https://git.kernel.org/stable/c/a2f6ded41bec1d3be643c80a5eb97f1680309001
- https://git.kernel.org/stable/c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2
- https://git.kernel.org/stable/c/f02edb9debbd36f44efa7567031485892c7df60d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.12