CVE-2025-40053 (GCVE-0-2025-40053)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-08-05 12:07
VLAI
Title
net: dlink: handle copy_thresh allocation failure
Summary
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
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 84fd710a704f3d53d4120e452e86cea558cf73a8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5aa9b885602811a026a3f45c92ea2b4b04c54f09 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9d49e4b14609e1a20d931e718962c4b6b5485174 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ea87151df398d407a632c7bf63013290f01c5009 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7ed5010fef0930f4322d620052edc854ef3ec41f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fd7b6b2c920d7fd370a612be416a904d6e1ebe55 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8169a6011c5fecc6cb1c3654c541c567d3318de8 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.195 , ≤ 5.15.* (semver)
Unaffected: 6.1.156 , ≤ 6.1.* (semver)
Unaffected: 6.6.112 , ≤ 6.6.* (semver)
Unaffected: 6.12.53 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/dlink/dl2k.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dlink: handle copy_thresh allocation failure\n\nThe driver did not handle failure of `netdev_alloc_skb_ip_align()`.\nIf the allocation failed, dereferencing `skb-\u003eprotocol` could lead to\na NULL pointer dereference.\n\nThis patch tries to allocate `skb`. If the allocation fails, it falls\nback to the normal path.\n\nTested-on: D-Link DGE-550T Rev-A3"
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            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40053",
    "datePublished": "2025-10-28T11:48:28.444Z",
    "dateReserved": "2025-04-16T07:20:57.157Z",
    "dateUpdated": "2026-08-05T12:07:23.851Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T08:53:21+00:00",
      "cve": "CVE-2025-40053",
      "id": "CVE-2025-40053",
      "initial_release_date": "2025-10-28T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: dlink: handle copy_thresh allocation failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40053.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-19T17:47:02Z",
      "cve": "CVE-2025-40053",
      "id": "CVE-2025-40053",
      "initial_release_date": "2025-10-29T00:25:12Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "685",
      "product_status:recommended": "420",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40053",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40053.json",
      "version": "44"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.