CVE-2025-40053net: dlink: handle copy_thresh allocation failure
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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
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 84fd710a704f3d53d4120e452e86cea558cf73a8; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5aa9b885602811a026a3f45c92ea2b4b04c54f09; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9d49e4b14609e1a20d931e718962c4b6b5485174; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ea87151df398d407a632c7bf63013290f01c5009; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7ed5010fef0930f4322d620052edc854ef3ec41f; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before fd7b6b2c920d7fd370a612be416a904d6e1ebe55; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8169a6011c5fecc6cb1c3654c541c567d3318de8 | CNA record |
References
- https://git.kernel.org/stable/c/84fd710a704f3d53d4120e452e86cea558cf73a8
- https://git.kernel.org/stable/c/5aa9b885602811a026a3f45c92ea2b4b04c54f09
- https://git.kernel.org/stable/c/9d49e4b14609e1a20d931e718962c4b6b5485174
- https://git.kernel.org/stable/c/ea87151df398d407a632c7bf63013290f01c5009
- https://git.kernel.org/stable/c/7ed5010fef0930f4322d620052edc854ef3ec41f
- https://git.kernel.org/stable/c/fd7b6b2c920d7fd370a612be416a904d6e1ebe55
- https://git.kernel.org/stable/c/8169a6011c5fecc6cb1c3654c541c567d3318de8
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.