{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42"
            },
            {
              "fixed": "3855b6a11f8a7aceb8181cc08c99afef58517006"
            },
            {
              "fixed": "52a818c586ae2c36b7324bfaefb547f5e866a8ae"
            },
            {
              "fixed": "d38554602a0b04e85fad28ce72c7500cf50d419b"
            },
            {
              "fixed": "7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.12.105"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.46"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80575.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: cs40l50-vibra - validate custom data from user space\n\ncs40l50_add() copies the custom data of an FF_PERIODIC/FF_CUSTOM effect\nstraight from the ff_effect the user passed to EVIOCSFF, without\nrequiring it to hold anything:\n\n    work_data.custom_data = memdup_array_user(periodic-\u003ecustom_data,\n                                              periodic-\u003ecustom_len,\n                                              sizeof(s16));\n    work_data.custom_len = periodic-\u003ecustom_len;\n\nThe driver then reads two words out of that buffer: custom_data[0] as the\nwaveform bank in cs40l50_effect_bank_set(), and custom_data[1] as the\nindex within the bank in cs40l50_effect_index_set().  Neither read is\ncovered by a length check, and custom_len is fully user controlled:\n\n  - custom_len == 0 makes memdup_array_user() call memdup_user() with a\n    length of zero, which returns ZERO_SIZE_PTR rather than an error, so\n    custom_data[0] dereferences it.\n\n  - custom_len == 1 allocates two bytes.  A bank of ROM or RAM keeps\n    effect-\u003etype out of the OWT case, and custom_data[1] is then read one\n    word past the allocation.\n\nThe bank value itself is also mishandled.  It is masked with\nCS40L50_CUSTOM_DATA_MASK (0xffff) but stored in an s16, so a\ncustom_data[0] of 0x8000 or above wraps to a negative value that passes\nthe \"bank_type \u003e= CS40L50_WVFRM_BANK_NUM\" test.\ncs40l50_effect_index_set() indexes vib-\u003edsp.banks[] with it before the\nswitch statement's default case gets a chance to reject it:\n\n    base_index = vib-\u003edsp.banks[effect-\u003etype].base_index;\n    max_index = vib-\u003edsp.banks[effect-\u003etype].max_index;\n\nRequire the two words the driver reads to be present, and hold the masked\nbank in a u32 so the existing upper-bound test covers the whole range.\nThe da7280 haptic driver already range checks custom_len this way.",
  "id": "CVE-2026-80575",
  "modified": "2026-08-28T03:30:53.263211467Z",
  "published": "2026-08-26T14:37:34.942Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80575.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80575"
    },
    {
      "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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Input: cs40l50-vibra - validate custom data from user space"
}