SB2025071194 - Input validation error in Linux kernel smb server

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2025-38325)

CWE-ID: CWE-20 - Improper input validation

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 improper input validation within the alloc_transport() function in fs/smb/server/transport_tcp.c, within the KSMBD_TRANS(), smb_direct_free_transport() and free_transport() functions in fs/smb/server/transport_rdma.c, within the ksmbd_conn_free() function in fs/smb/server/connection.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/3890da762a66191c440b0bd6e3ee45501edbb0c1
• https://git.kernel.org/stable/c/3f3aae77280aad9f5acc6709c596148966f765c7
• https://git.kernel.org/stable/c/a89f5fae998bdc4d0505306f93844c9ae059d50c