SB2025081873 - Input validation error in Linux kernel smb server
Published: August 18, 2025 Updated: September 17, 2025
Security Bulletin ID
SB2025081873
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2025-38501)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the alloc_transport() and ksmbd_kthread_fn() functions in fs/smb/server/transport_tcp.c. A remote attacker can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/6073afe64510c302b7a0683a01e32c012eff715d
- https://git.kernel.org/stable/c/7e5d91d3e6c62a9755b36f29c35288f06c3cd86b
- https://git.kernel.org/stable/c/cb092fc3a62972a4aa47c9fe356c2c6a01cd840b
- https://git.kernel.org/stable/c/e6bb9193974059ddbb0ce7763fa3882bd60d4dc3
- https://git.kernel.org/stable/c/f1ce9258bcbce2491f9f71f7882b6eed0b33ec65
- https://git.kernel.org/stable/c/fa1c47af4ff641cf9197ecdb1f8240cbb30389c1