CVE-2025-40035
In the Linux kernel, the following vulnerability has been resolved: Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak Struct ff_effect_compat is embedded twice inside uinput_ff_upload_compat, contains internal padding. In particular, there is a hole after struct ff_replay to satisfy alignment requirements for the following union member. Without clearing the structure, copy_to_user() may leak stack data to userspace. Initialize ff_up_compat to zero before filling valid fields.
Affected versions
Linux kernel versions
2.6.29
and later are affected. Fixed in
5.4.301,
5.10.246,
5.15.195,
6.1.156,
6.6.112,
6.12.53,
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40035 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/1b317796013f666ae5040edbf0f230ec61496d42
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PatchKernel patch commithttps://git.kernel.org/stable/c/48c96b7e9e03516936d6deba54b5553097eae817
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PatchKernel patch commithttps://git.kernel.org/stable/c/877172b97786ed1678640dff0b2d35abb328844c
Frequently asked questions
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What is CVE-2025-40035?
CVE-2025-40035 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.29 onward and has been patched in 5.4.301, 5.10.246, 5.15.195 and others. CVE-2025-40035 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-2025-40035?
Yes — CVE-2025-40035 has been patched. Fixed versions include 5.4.301, 5.10.246, 5.15.195 and others. If you are running Linux kernel 2.6.29 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40035 actively exploited?
No — CVE-2025-40035 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.