CVE-2025-40121
In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: bytcr_rt5651: Fix invalid quirk input mapping When an invalid value is passed via quirk option, currently bytcr_rt5640 driver just ignores and leaves as is, which may lead to unepxected results like OOB access. This patch adds the sanity check and corrects the input mapping to the certain default value if an invalid value is passed.
Affected versions
Linux kernel versions
4.18
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-2025-40121 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/2204e582b4eea872e1e7a5c90edcb84b928c68b0
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PatchKernel patch commithttps://git.kernel.org/stable/c/4336efb59ef364e691ef829a73d9dbd4d5ed7c7b
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PatchKernel patch commithttps://git.kernel.org/stable/c/64a36a7032082b4c330ce081acb6efb99246020e
Frequently asked questions
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What is CVE-2025-40121?
CVE-2025-40121 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.18 onward and has been patched in 5.4.301, 5.10.246, 5.15.195 and others. CVE-2025-40121 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-2025-40121?
Yes — CVE-2025-40121 has been patched. Fixed versions include 5.4.301, 5.10.246, 5.15.195 and others. If you are running Linux kernel 4.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40121 actively exploited?
No — CVE-2025-40121 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.