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CVE-2025-40053

net: dlink: handle copy_thresh allocation failure

HIGH
7.5
CVSS Score
Published: October 28, 2025 at 11:48 AM UTC
Updated: October 19, 2026 at 09:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
1da177e4c3f41524e886b7f1b8a0c1fc7321cac22.6.12
Vendor states this is fixed in 5aa9b885602811a026a3f45c92ea2b4b04c54f09 (fixed)
Vendor states this is fixed in 7ed5010fef0930f4322d620052edc854ef3ec41f (fixed)
Vendor states this is fixed in 8169a6011c5fecc6cb1c3654c541c567d3318de8 (fixed)
Vendor states this is fixed in 84fd710a704f3d53d4120e452e86cea558cf73a8 (fixed)
Vendor states this is fixed in 9d49e4b14609e1a20d931e718962c4b6b5485174 (fixed)
Vendor states this is fixed in ea87151df398d407a632c7bf63013290f01c5009 (fixed)
Vendor states this is fixed in fd7b6b2c920d7fd370a612be416a904d6e1ebe55 (fixed)
Vendor states this is fixed in 2.6.12 (unaffected)
Vendor states this is fixed in 5.10.246 (unaffected)
Vendor states this is fixed in 5.15.195 (unaffected)
Vendor states this is fixed in 6.1.156 (unaffected)
Vendor states this is fixed in 6.12.53 (unaffected)
Vendor states this is fixed in 6.17.3 (unaffected)
Vendor states this is fixed in 6.18 (unaffected)
Vendor states this is fixed in 6.6.112 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

Source: cverecord
https://git.kernel.org/stable/c/5aa9b885602811a026a3f45c92ea2b4b04c54f09
Source: cverecord
https://git.kernel.org/stable/c/9d49e4b14609e1a20d931e718962c4b6b5485174
Source: cverecord
https://git.kernel.org/stable/c/ea87151df398d407a632c7bf63013290f01c5009
Source: cverecord
https://git.kernel.org/stable/c/7ed5010fef0930f4322d620052edc854ef3ec41f
Source: cverecord
https://git.kernel.org/stable/c/fd7b6b2c920d7fd370a612be416a904d6e1ebe55
Source: cverecord
https://git.kernel.org/stable/c/8169a6011c5fecc6cb1c3654c541c567d3318de8
Source: cverecord
https://git.kernel.org/stable/c/84fd710a704f3d53d4120e452e86cea558cf73a8

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHLinux
Vector?

Quick Info

StatusDEFERRED

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