CVE-2025-40170

Full vulnerability record from the local CVENow database.
Description

In the Linux kernel, the following vulnerability has been resolved: net: use dst_dev_rcu() in sk_setup_caps() Use RCU to protect accesses to dst->dev from sk_setup_caps() and sk_dst_gso_max_size(). Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(), and ip_dst_mtu_maybe_forward(). ip4_dst_hoplimit() can use dst_dev_net_rcu().
Severity
HIGH
CVSS score
7.8 (v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-11-12 11:15:47.393000
Last modified
2026-10-30 13:18:14.247000
View original CVE JSON
{
  "id": "CVE-2025-40170",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-11-12T11:15:47.393",
  "lastModified": "2026-10-30T13:18:14.247",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: use dst_dev_rcu() in sk_setup_caps()\n\nUse RCU to protect accesses to dst->dev from sk_setup_caps()\nand sk_dst_gso_max_size().\n\nAlso use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(),\nand ip_dst_mtu_maybe_forward().\n\nip4_dst_hoplimit() can use dst_dev_net_rcu()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: usar dst_dev_rcu() en sk_setup_caps()\n\nUsar RCU para proteger los accesos a dst->dev desde sk_setup_caps() y sk_dst_gso_max_size().\n\nTambién usar dst_dev_rcu() en ip6_dst_mtu_maybe_forward(), e ip_dst_mtu_maybe_forward().\n\nip4_dst_hoplimit() puede usar dst_dev_net_rcu()."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "include/net/ip.h",
            "include/net/ip6_route.h",
            "include/net/route.h",
            "net/core/sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
              "lessThan": "13b0e14bfa7e6d506d8d6426b9e6d7feef01ded3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
              "lessThan": "9f22b5f7f1a32f8bbcc82bf34e34ea63523fcd02",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
              "lessThan": "5d1be493d1110c9e720b4c51a6e587bb2fb4ac12",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
              "lessThan": "a805729c0091073d8f0415cfa96c7acd1bc17a48",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
              "lessThan": "99a2ace61b211b0be861b07fbaa062fca4b58879",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "include/net/ip.h",
            "include/net/ip6_route.h",
            "include/net/route.h",
            "net/core/sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4.13",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "4.13",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.64",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.3",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-16T19:33:10.426175Z",
          "id": "CVE-2025-40170",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/13b0e14bfa7e6d506d8d6426b9e6d7feef01ded3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5d1be493d1110c9e720b4c51a6e587bb2fb4ac12",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/99a2ace61b211b0be861b07fbaa062fca4b58879",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9f22b5f7f1a32f8bbcc82bf34e34ea63523fcd02",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a805729c0091073d8f0415cfa96c7acd1bc17a48",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}