ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES

{
  "id": "0fde6b2a204cc2383b160ea8b785b54c6298e95573228ec2ede53cfef5881ddc",
  "url": "https://osv.dev/vulnerability/CVE-2026-63987",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES ethnl_update_profile() walks the ETHTOOL_A_PROFILE_IRQ_MODERATION nest list with an index 'i' and writes new_profile[i++] without bounding i. The destination is kmemdup()'d at NET_DIM_PARAMS_NUM_PROFILES entries (5), but the Netlink nest count is entirely user-controlled. Netlink policies do not have support for constraining the number of nested entries (or number of multi-attr entries).",
    "evidence": "osv:CVE-2026-63987",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.93",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.35",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-63987",
      "aliases": [
        "CVE-2026-63987"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f750dfe825b904164688adeb147950e0e0c4d262"
                },
                {
                  "fixed": "d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc"
                },
                {
                  "fixed": "0c02c190bcd9822477038ff2cee10ea584ac1b1d"
                },
                {
                  "fixed": "6205f7166d2dd14a017a5802c81e5bd1421a8635"
                },
                {
                  "fixed": "7281b096b072f6c6e30420e3467d738f2e4c4b57"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63987.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.11.0"
                },
                {
                  "fixed": "6.12.93"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.35"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.12"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63987.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.024957626Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d",
        "https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635",
        "https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57",
        "https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63987.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63987",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63987.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-63987",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488343,
  "published_at": "2026-07-19T14:56:08.94+00:00"
}