CVE-2025-40053
In the Linux kernel, the following vulnerability has been resolved: net: dlink: handle copy_thresh allocation failure The driver did not handle failure of `netdev_alloc_skb_ip_align()`. If the allocation failed, dereferencing `skb->protocol` could lead to a NULL pointer dereference. This patch tries to allocate `skb`. If the allocation fails, it falls back to the normal path. Tested-on: D-Link DGE-550T Rev-A3
Affected versions
Linux kernel versions
2.6.12
and later are affected. Fixed in
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-2025-40053 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/5aa9b885602811a026a3f45c92ea2b4b04c54f09
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PatchKernel patch commithttps://git.kernel.org/stable/c/7ed5010fef0930f4322d620052edc854ef3ec41f
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PatchKernel patch commithttps://git.kernel.org/stable/c/8169a6011c5fecc6cb1c3654c541c567d3318de8
Frequently asked questions
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What is CVE-2025-40053?
CVE-2025-40053 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.12 onward and has been patched in 5.10.246, 5.15.195, 6.1.156 and others. CVE-2025-40053 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-2025-40053?
Yes — CVE-2025-40053 has been patched. Fixed versions include 5.10.246, 5.15.195, 6.1.156 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40053 actively exploited?
No — CVE-2025-40053 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.