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Vulnerability DatabaseCVE-2025-39975
CVE-2025-39975:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-39975 was discovered and published on October 15, 2025, affecting the Linux kernel's SMB client implementation. The vulnerability involves incorrect index referencing in the smb2compoundop() function, which processes command responses (NVD).
Technical details
The vulnerability exists in the smb2compoundop() function where the loop that processes each command's response uses wrong indices when accessing response buffers. This incorrect indexing not only leads to improper handling of command results but can also cause out-of-bounds accesses if the incorrectly computed index is greater than or equal to MAX_COMPOUND (NVD).
Impact
The vulnerability can result in improper handling of command results and potential out-of-bounds memory accesses in the Linux kernel's SMB client implementation. This could affect systems using SMB client functionality to access network shares (NVD).
Mitigation and workarounds
Some distributions have already implemented fixes, such as Ubuntu's linux-azure package version 6.17.0-1004.4 for release 25.10 questing. Other affected versions are being updated with patches (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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