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CVE-2026-74290

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

net/sched: cls_flow: Dont expose folded kernel pointers

The flow classifier falls back to addr_fold() for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can observe the resulting classid through class statistics. This allows a tc classifier in a user/network namespace to recover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct().

Align with standard kernel practices for pointer hashing and replace the XOR folding with a keyed siphash (which is cryptographically secure)

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-74290",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
              "lessThan": "19f2ecf8ea564562c7e7a919cf38068dd9aa1c96",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
              "lessThan": "3d054001860270748405a3f9270c5fa0bf7ffc19",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
              "lessThan": "fb31fbe51c233f3bf47021121f63d2e42cac2d08",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
              "lessThan": "0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
              "lessThan": "6151159618198675e01c391676e579738286c135",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
              "lessThan": "f294fc71c4a0fa4964f6428a1b4e7929c1d83125",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/sched/cls_flow.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.25"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.25",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/sched/cls_flow.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:28.570",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/19f2ecf8ea564562c7e7a919cf38068dd9aa1c96",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3d054001860270748405a3f9270c5fa0bf7ffc19",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6151159618198675e01c391676e579738286c135",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f294fc71c4a0fa4964f6428a1b4e7929c1d83125",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fb31fbe51c233f3bf47021121f63d2e42cac2d08",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_flow: Dont expose folded kernel pointers\n\nThe flow classifier falls back to addr_fold() for fields that are missing\nfrom packet headers. In map mode, userspace controls mask, xor, rshift,\naddend and divisor, and can observe the resulting classid through class\nstatistics. This allows a tc classifier in a user/network namespace to\nrecover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct().\n\nAlign with standard kernel practices for pointer hashing and replace the\nXOR folding with a keyed siphash (which is cryptographically secure)"
    }
  ],
  "lastModified": "2026-08-17T06:19:22.973",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}