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

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-10-15 22:02
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
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:56 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
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)
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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)
guessed Create a notification for this product.
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                "id": "CVE-2025-40053",
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              "value": "AV:N - The vulnerable code is the NIC RX completion path reached solely by frames arriving on the wire, and small IP packets routed from anywhere on the internet land in this path. No local access or account on the target is needed.\nAC:L - The gating condition is a GFP_ATOMIC skb allocation failure, which an attacker can reliably drive by flooding the interface and exhausting memory while simultaneously supplying the short frames that take the copy-break branch. The identical stmmac RX-exhaustion NULL deref was scored AC:L.\nPR:N - Frames are processed in the interrupt handler before any socket, credential, or filtering decision, so an unauthenticated attacker with no account on the system triggers the path just by sending traffic.\nUI:N - Packet reception and the resulting dereference happen autonomously in the driver\u0027s interrupt handler; no local user action is required.\nS:U - The fault occurs in the kernel and its impact is confined to the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:N - The dereference is at a fixed small offset from NULL with no attacker control over the address or any returned data, so no kernel memory contents are disclosed.\nI:N - The only write is `skb-\u003edev = dev` at a fixed NULL-page offset that is unmapped under mmap_min_addr; it yields no controlled write primitive and modifies no kernel data.\nA:H - The NULL dereference occurs in hard-IRQ context, producing a fatal exception in interrupt and a full kernel panic, and it can be re-triggered by an unauthenticated remote attacker."
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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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            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: dlink: manejar el fallo de asignaci\u00f3n de copy_thresh\n\nEl controlador no manej\u00f3 el fallo de \u0027netdev_alloc_skb_ip_align()\u0027.\nSi la asignaci\u00f3n fallaba, desreferenciar \u0027skb-\u003eprotocol\u0027 podr\u00eda llevar a una desreferencia de puntero NULL.\n\nEste parche intenta asignar \u0027skb\u0027. Si la asignaci\u00f3n falla, recurre a la ruta normal.\n\nProbado en: D-Link DGE-550T Rev-A3"
          }
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        "id": "CVE-2025-40053",
        "lastModified": "2026-10-19T21:10:00.160",
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                "attackVector": "NETWORK",
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                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-15T21:56:34.706462Z",
                "version": "2.0.3"
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        "published": "2025-10-28T12:15:39.510",
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        "vulnStatus": "Deferred"
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    "redhat_vex": {
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      "current_release_date": "2026-11-05T15:19:40+00:00",
      "cve": "CVE-2025-40053",
      "id": "CVE-2025-40053",
      "initial_release_date": "2025-10-28T00:00:00+00:00",
      "product_status:known_affected": "158",
      "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"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.