CVE-2025-40354
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: increase max link count and fix link->enc NULL pointer access [why] 1.) dc->links[MAX_LINKS] array size smaller than actual requested. max_connector + max_dpia + 4 virtual = 14. increase from 12 to 14. 2.) hw_init() access null LINK_ENC for dpia non display_endpoint. (cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)
Affected versions
Linux kernel versions
4.15
and later are affected. Fixed in
6.12.56,
6.17.6,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40354 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/a3fc0d36cfb927f8986b83bf5fba47dbedad3c63
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PatchKernel patch commithttps://git.kernel.org/stable/c/bec947cbe9a65783adb475a5fb47980d7b4f4796
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PatchKernel patch commithttps://git.kernel.org/stable/c/f28092be4e12b7df9e4f415d25bf0d767bc2d9ed
Frequently asked questions
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What is CVE-2025-40354?
CVE-2025-40354 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.15 onward and has been patched in 6.12.56, 6.17.6 and 6.18. CVE-2025-40354 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-2025-40354?
Yes — CVE-2025-40354 has been patched. Fixed versions include 6.12.56, 6.17.6 and 6.18. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40354 actively exploited?
No — CVE-2025-40354 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.