SB2025100440 - Memory leak in Linux kernel smb client
Published: October 4, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100440
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) Memory leak (CVE-ID: CVE-2023-53597)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/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 memory leak within the cifs_demultiplex_thread() function in fs/smb/client/connect.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/57d25e9905c71133e201f6d06b56a3403d4ad433
- https://git.kernel.org/stable/c/69cba9d3c1284e0838ae408830a02c4a063104bc
- https://git.kernel.org/stable/c/c55901d381a22300c9922170e59704059f50977b
- https://git.kernel.org/stable/c/df31d05f0678cdd0796ea19983a2b93edca18bb0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.150