CVE-2025-39975
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix wrong index reference in smb2_compound_op() In smb2_compound_op(), the loop that processes each command's response uses wrong indices when accessing response bufferes. This incorrect indexing leads to improper handling of command results. Also, if incorrectly computed index is greather than or equal to MAX_COMPOUND, it can cause out-of-bounds accesses.
Affected versions
Linux kernel versions
6.6.75,
6.12.12,
6.13.1,
6.14
and later are affected. Fixed in
6.6.109,
6.12.50,
6.16.10,
6.17
and their respective stable series.
References
The following references provide additional information about CVE-2025-39975 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/093615fc76063ea08d454ba86677ce64c736e806
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PatchKernel patch commithttps://git.kernel.org/stable/c/ba7bcfd52c66dd1c2dfa5142aca7e4a70b62dfa5
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PatchKernel patch commithttps://git.kernel.org/stable/c/bfb1e2aad1fecef8320fd71332acde0d53a8d699
Frequently asked questions
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What is CVE-2025-39975?
CVE-2025-39975 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.6.75 onward and has been patched in 6.6.109, 6.12.50, 6.16.10 and others. CVE-2025-39975 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-39975?
Yes — CVE-2025-39975 has been patched. Fixed versions include 6.6.109, 6.12.50, 6.16.10 and others. If you are running Linux kernel 6.6.75 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-39975 actively exploited?
No — CVE-2025-39975 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.