FKIE_CVE-2026-74616

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: xdp: reject clones that overrun skb_shared_info tailroom xdpf_clone() clones broadcast copies into a single page and sets frame_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that page like a normal XDP frame and expects the usual skb_shared_info tailroom at the end of the buffer. The current check only rejects frames whose linear xdp_frame header, headroom, and packet data exceed PAGE_SIZE. A source frame backed by a larger allocation can still satisfy that check while extending into the clone's required shared-info area. When such a clone is converted back into an skb, build_skb_around() places skb_shared_info over live packet bytes and later writes can corrupt XDP return metadata. Reject clones unless their linear area fits inside SKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already enforced by the XDP-to-skb conversion path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/58408982fa39f9758124cec169f42854d6f98f35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/685edea27ac68d08fe4dbd3de74b858d2ad8e830
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba13763d667e008e185fedf592d53846a5b457d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e48e8edbef2eb824201495daa5234560f632b23c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef4b7c7046d29a67090de15af0da0d1ae8d1b192
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fab820f1691a9e26d9031f18aae1e9ce09078f92
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/xdp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "58408982fa39f9758124cec169f42854d6f98f35",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            },
            {
              "lessThan": "685edea27ac68d08fe4dbd3de74b858d2ad8e830",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            },
            {
              "lessThan": "ba13763d667e008e185fedf592d53846a5b457d1",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            },
            {
              "lessThan": "ef4b7c7046d29a67090de15af0da0d1ae8d1b192",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            },
            {
              "lessThan": "fab820f1691a9e26d9031f18aae1e9ce09078f92",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            },
            {
              "lessThan": "f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            },
            {
              "lessThan": "e48e8edbef2eb824201495daa5234560f632b23c",
              "status": "affected",
              "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/xdp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nxdp: reject clones that overrun skb_shared_info tailroom\n\nxdpf_clone() clones broadcast copies into a single page and sets\nframe_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that\npage like a normal XDP frame and expects the usual skb_shared_info\ntailroom at the end of the buffer.\n\nThe current check only rejects frames whose linear xdp_frame header,\nheadroom, and packet data exceed PAGE_SIZE. A source frame backed by a\nlarger allocation can still satisfy that check while extending into the\nclone\u0027s required shared-info area. When such a clone is converted back\ninto an skb, build_skb_around() places skb_shared_info over live packet\nbytes and later writes can corrupt XDP return metadata.\n\nReject clones unless their linear area fits inside\nSKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already\nenforced by the XDP-to-skb conversion path."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxdp: rechazar clones que exceden el espacio de cola de skb_shared_info\n\nxdpf_clone() clona copias de difusi\u00f3n en una sola p\u00e1gina y establece frame_sz a PAGE_SIZE. __xdp_build_skb_from_frame() m\u00e1s tarde trata esa p\u00e1gina como un frame XDP normal y espera el espacio de cola habitual de skb_shared_info al final del b\u00fafer.\n\nLa comprobaci\u00f3n actual solo rechaza frames cuyo encabezado xdp_frame lineal, espacio inicial y datos de paquete exceden PAGE_SIZE. Un frame de origen respaldado por una asignaci\u00f3n mayor a\u00fan puede satisfacer esa comprobaci\u00f3n mientras se extiende hacia el \u00e1rea de informaci\u00f3n compartida requerida del clon. Cuando dicho clon se convierte de nuevo en un skb, build_skb_around() coloca skb_shared_info sobre bytes de paquete activos y escrituras posteriores pueden corromper los metadatos de retorno de XDP.\n\nRechazar clones a menos que su \u00e1rea lineal quepa dentro de SKB_WITH_OVERHEAD(PAGE_SIZE), coincidiendo con el requisito de espacio de cola ya aplicado por la ruta de conversi\u00f3n de XDP a skb."
    }
  ],
  "id": "CVE-2026-74616",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-22T16:16:34.280",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/58408982fa39f9758124cec169f42854d6f98f35"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/685edea27ac68d08fe4dbd3de74b858d2ad8e830"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ba13763d667e008e185fedf592d53846a5b457d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e48e8edbef2eb824201495daa5234560f632b23c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef4b7c7046d29a67090de15af0da0d1ae8d1b192"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fab820f1691a9e26d9031f18aae1e9ce09078f92"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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