{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7318166cacad158b46240f66250d7cc5a481653b"
            },
            {
              "fixed": "f1a2869b3629c0e8394b77b38cb9f19a018c653c"
            },
            {
              "fixed": "fd1a78c16b1f6978c09cf048e15f349732e4c707"
            },
            {
              "fixed": "b231b6d8516d3fe0d4bba549908e08d26a4531a5"
            },
            {
              "fixed": "cdb719f4b8596d9ccee2d56d204c2c4dce982f46"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.11.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98030.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size\n\nbcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitmap into\nrule_locs[] without consulting nfc-\u003erule_cnt, which is how many entries\nthe caller had room for.  ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN\nand the ioctl sizes the buffer from the rule_cnt userspace passes in, so\nonce an admin has installed CFP rules any user can ask for fewer slots\nthan there are rules and run off the end of the allocation.  A rule_cnt\nof 0 leaves the buffer pointer NULL and the walk dereferences it.",
  "id": "CVE-2026-98030",
  "modified": "2026-09-27T03:30:31.611875347Z",
  "published": "2026-09-25T10:23:46.959Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98030.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98030"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size"
}