CVE-2025-39768

{
  "id": "CVE-2025-39768",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-09-11T17:15:42.250",
  "lastModified": "2026-10-19T21:10:00.160",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, fix complex rules rehash error flow\n\nMoving rules from matcher to matcher should not fail.\nHowever, if it does fail due to various reasons, the error flow\nshould allow the kernel to continue functioning (albeit with broken\nsteering rules) instead of going into series of soft lock-ups or\nsome other problematic behaviour.\n\nSimilar to the simple rules, complex rules rehash logic suffers\nfrom the same problems. This patch fixes the error flow for moving\ncomplex rules:\n - If new rule creation fails before it was even enqeued, do not\n   poll for completion\n - If TIMEOUT happened while moving the rule, no point trying\n   to poll for completions for other rules. Something is broken,\n   completion won't come, just abort the rehash sequence.\n - If some other completion with error received, don't give up.\n   Continue handling rest of the rules to minimize the damage.\n - Make sure that the first error code that was received will\n   be actually returned to the caller instead of replacing it\n   with the generic error code.\n\nAll the aforementioned issues stem from the same bad error flow,\nso no point fixing them one by one and leaving partially broken\ncode - fixing them in one patch."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/mlx5: HWS, corregir el flujo de error de rehash de reglas complejas\n\nMover reglas de matcher a matcher no debería fallar.\nSin embargo, si falla por diversas razones, el flujo de error\ndebería permitir que el kernel siga funcionando (aunque con reglas de direccionamiento rotas)\nen lugar de entrar en una serie de soft lock-ups o\nalgún otro comportamiento problemático.\n\nSimilar a las reglas simples, la lógica de rehash de reglas complejas\nsufre de los mismos problemas. Este parche corrige el flujo de error para mover\nreglas complejas:\n - Si la creación de una nueva regla falla antes de que fuera siquiera encolada, no\n   sondear para la finalización.\n - Si ocurrió un TIMEOUT mientras se movía la regla, no tiene sentido intentar\n   sondear para finalizaciones de otras reglas. Algo está roto,\n   la finalización no llegará, simplemente abortar la secuencia de rehash.\n - Si se recibió alguna otra finalización con error, no rendirse.\n   Continuar manejando el resto de las reglas para minimizar el daño.\n - Asegurarse de que el primer código de error que se recibió será\n   realmente devuelto al llamador en lugar de reemplazarlo\n   con el código de error genérico.\n\nTodos los problemas antes mencionados provienen del mismo flujo de error deficiente,\nasí que no tiene sentido arreglarlos uno por uno y dejar código parcialmente roto\n- arreglándolos en un solo parche."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc_complex.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "17e0accac577fd6ea2090934d71a8c6f36702a26",
              "lessThan": "37d54bc28d092bc3b314da45d730f00e9d86ec2a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "17e0accac577fd6ea2090934d71a8c6f36702a26",
              "lessThan": "4a842b1bf18a32ee0c25dd6dd98728b786a76fe4",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc_complex.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.16.4",
              "lessThanOrEqual": "6.16.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "6.16",
              "versionEndExcluding": "6.16.4",
              "matchCriteriaId": "26A22BE8-0D22-4155-AED4-BB823BB934AB"
            },
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              "criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C"
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              "matchCriteriaId": "C730CD9A-D969-4A8E-9522-162AAF7C0EE9"
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  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/37d54bc28d092bc3b314da45d730f00e9d86ec2a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/4a842b1bf18a32ee0c25dd6dd98728b786a76fe4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    }
  ]
}