CVE-2025-40066
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: Check phy before init msta_link in mt7996_mac_sta_add_links() In order to avoid a possible NULL pointer dereference in mt7996_mac_sta_init_link routine, move the phy pointer check before running mt7996_mac_sta_init_link() in mt7996_mac_sta_add_links routine.
Affected versions
Linux kernel versions
6.15
and later are affected. Fixed in
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40066 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/2e671536c1c3c7bcad95d408a4ab42e2e54d1882
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PatchKernel patch commithttps://git.kernel.org/stable/c/fe5fffadc6c77c56f122cf1042dc830f59e904bf
Frequently asked questions
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What is CVE-2025-40066?
CVE-2025-40066 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.15 onward and has been patched in 6.17.3 and 6.18. CVE-2025-40066 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-2025-40066?
Yes — CVE-2025-40066 has been patched. Fixed versions include 6.17.3 and 6.18. If you are running Linux kernel 6.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40066 actively exploited?
No — CVE-2025-40066 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.