CVE-2025-39943
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-04-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer If data_offset and data_length of smb_direct_data_transfer struct are invalid, out of bounds issue could happen. This patch validate data_offset and data_length field in recv_done.
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Meta Information
Published
2025-10-04
Last Modified
2026-04-06
Generated
2026-06-16
AI Q&A
2025-10-04
EPSS Evaluated
2026-06-14
NVD
CVE-2025-39943
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's ksmbd component involves improper validation of the data_offset and data_length fields in the smb_direct_data_transfer structure. If these fields are invalid, it can lead to an out-of-bounds issue, potentially causing memory corruption or crashes. The patch fixes this by validating these fields during the recv_done process.

Impact Analysis

If exploited, this vulnerability could cause out-of-bounds memory access, which may lead to system instability, crashes, or potentially allow an attacker to execute arbitrary code or cause denial of service on affected Linux systems using ksmbd.

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