FKIE_CVE-2025-40159

Vulnerability from fkie_nvd - Published: 2025-11-12 11:15 - Updated: 2026-10-19 21:10
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: xsk: Harden userspace-supplied xdp_desc validation Turned out certain clearly invalid values passed in xdp_desc from userspace can pass xp_{,un}aligned_validate_desc() and then lead to UBs or just invalid frames to be queued for xmit. desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len can cause positive integer overflow and wraparound, the same way low enough desc->addr with a non-zero pool->tx_metadata_len can cause negative integer overflow. Both scenarios can then pass the validation successfully. This doesn't happen with valid XSk applications, but can be used to perform attacks. Always promote desc->len to ``u64`` first to exclude positive overflows of it. Use explicit check_{add,sub}_overflow() when validating desc->addr (which is ``u64`` already). bloat-o-meter reports a little growth of the code size: add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44) Function old new delta xskq_cons_peek_desc 299 330 +31 xsk_tx_peek_release_desc_batch 973 1002 +29 xsk_generic_xmit 3148 3132 -16 but hopefully this doesn't hurt the performance much.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07ca98f906a403637fc5e513a872a50ef1247f3b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1463cd066f32efd56ddfd3ac4e3524200f362980
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b5fffa7c81e55d8c8edf05ad40d811ec7047e21
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk_queue.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1463cd066f32efd56ddfd3ac4e3524200f362980",
              "status": "affected",
              "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899",
              "versionType": "git"
            },
            {
              "lessThan": "5b5fffa7c81e55d8c8edf05ad40d811ec7047e21",
              "status": "affected",
              "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899",
              "versionType": "git"
            },
            {
              "lessThan": "07ca98f906a403637fc5e513a872a50ef1247f3b",
              "status": "affected",
              "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk_queue.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Harden userspace-supplied xdp_desc validation\n\nTurned out certain clearly invalid values passed in xdp_desc from\nuserspace can pass xp_{,un}aligned_validate_desc() and then lead\nto UBs or just invalid frames to be queued for xmit.\n\ndesc-\u003elen close to ``U32_MAX`` with a non-zero pool-\u003etx_metadata_len\ncan cause positive integer overflow and wraparound, the same way low\nenough desc-\u003eaddr with a non-zero pool-\u003etx_metadata_len can cause\nnegative integer overflow. Both scenarios can then pass the\nvalidation successfully.\nThis doesn\u0027t happen with valid XSk applications, but can be used\nto perform attacks.\n\nAlways promote desc-\u003elen to ``u64`` first to exclude positive\noverflows of it. Use explicit check_{add,sub}_overflow() when\nvalidating desc-\u003eaddr (which is ``u64`` already).\n\nbloat-o-meter reports a little growth of the code size:\n\nadd/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)\nFunction                                     old     new   delta\nxskq_cons_peek_desc                          299     330     +31\nxsk_tx_peek_release_desc_batch               973    1002     +29\nxsk_generic_xmit                            3148    3132     -16\n\nbut hopefully this doesn\u0027t hurt the performance much."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nxsk: Reforzar la validaci\u00f3n de xdp_desc suministrada por el espacio de usuario\n\nResult\u00f3 que ciertos valores claramente inv\u00e1lidos pasados en xdp_desc desde el espacio de usuario pueden pasar xp_{,un}aligned_validate_desc() y luego llevar a UBs o simplemente a que se encolen tramas inv\u00e1lidas para xmit.\n\ndesc-\u003elen cercano a U32_MAX con un pool-\u003etx_metadata_len distinto de cero puede causar desbordamiento de entero positivo y \u0027wraparound\u0027, de la misma manera que un desc-\u003eaddr lo suficientemente bajo con un pool-\u003etx_metadata_len distinto de cero puede causar desbordamiento de entero negativo. Ambos escenarios pueden entonces pasar la validaci\u00f3n con \u00e9xito.\nEsto no ocurre con aplicaciones XSk v\u00e1lidas, pero puede usarse para realizar ataques.\n\nSiempre promover desc-\u003elen a u64 primero para excluir desbordamientos positivos del mismo. Usar check_{add,sub}_overflow() expl\u00edcito al validar desc-\u003eaddr (que ya es u64).\n\nbloat-o-meter informa un peque\u00f1o crecimiento del tama\u00f1o del c\u00f3digo:\n\nadd/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)\nFunci\u00f3n                                     antiguo     nuevo   delta\nxskq_cons_peek_desc                          299     330     +31\nxsk_tx_peek_release_desc_batch               973    1002     +29\nxsk_generic_xmit                            3148    3132     -16\n\npero esperemos que esto no perjudique mucho el rendimiento."
    }
  ],
  "id": "CVE-2025-40159",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40159",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-15T21:57:23.652232Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-11-12T11:15:46.000",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/07ca98f906a403637fc5e513a872a50ef1247f3b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1463cd066f32efd56ddfd3ac4e3524200f362980"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5b5fffa7c81e55d8c8edf05ad40d811ec7047e21"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



Log in or create an account to share your comment.




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

Loading timeline…




    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.