CVE-2025-40053

HighCVSS 7.5/10Last modified Oct 19, 2026

Description

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

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

No affected versions have been published.

Timeline

Published
Oct 28, 2025
Last modified
Oct 19, 2026
NVD status
Deferred

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CVE-2025-40053: High severity, CVSS 7.5 | Vulnix