{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2d56f3a32c0e62f99c043d2579840f9731fe5855"
            },
            {
              "fixed": "ed0905fda39682d3da7937184397d3276abbffa8"
            },
            {
              "fixed": "ec174c2ab1abb76b20fa167c6db848c3d97aa838"
            },
            {
              "fixed": "6c26681c5668c973bd0e951407d670ac60d9cd66"
            },
            {
              "fixed": "c5e573bb095d502be7cbbaa99c26a20984111c6d"
            },
            {
              "fixed": "b878720e8bcaa4cf7163a5081f904dd6baf11b2c"
            },
            {
              "fixed": "0d05b43b55d4784a42ce8fb318175f8ad7d9af5a"
            },
            {
              "fixed": "ed0406e490f48ed180df140fe2a81be26bccb1a9"
            },
            {
              "fixed": "f84819ef8d66931ee3998fee3c4f03230f4cb6cc"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.29"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98201.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: zero ff_effect before compat copy in input_ff_effect_from_user\n\nIn the compat path input_ff_effect_from_user() aliases the caller's\nnative struct ff_effect with the smaller struct ff_effect_compat and\ncopies only the compat sized prefix:\n\n\tcompat_effect = (struct ff_effect_compat *)effect;\n\n\tif (copy_from_user(compat_effect, buffer,\n\t\t\t   sizeof(struct ff_effect_compat)))\n\nThe tail of the native structure is never written. Callers pass an\nuninitialized on-stack object, for example evdev_do_ioctl() for\nEVIOCSFF, so those bytes keep their previous stack contents.\ninput_ff_upload() then stores the full native structure in\nff-\u003eeffects[id], from where a uinput based force feedback daemon can\nread it back via UI_BEGIN_FF_UPLOAD, disclosing kernel stack memory to\nuserspace.\n\nZero the effect before the compat copy.",
  "id": "CVE-2026-98201",
  "modified": "2026-10-07T02:30:38.165419639Z",
  "published": "2026-10-06T08:44:38.952Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d05b43b55d4784a42ce8fb318175f8ad7d9af5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c26681c5668c973bd0e951407d670ac60d9cd66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b878720e8bcaa4cf7163a5081f904dd6baf11b2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5e573bb095d502be7cbbaa99c26a20984111c6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec174c2ab1abb76b20fa167c6db848c3d97aa838"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed0406e490f48ed180df140fe2a81be26bccb1a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed0905fda39682d3da7937184397d3276abbffa8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f84819ef8d66931ee3998fee3c4f03230f4cb6cc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98201.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98201"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Input: zero ff_effect before compat copy in input_ff_effect_from_user"
}