Vulnerability-Lookup

CVE-2026-80575 (GCVE-0-2026-80575)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-26 14:37

Title

Input: cs40l50-vibra - validate custom data from user space

Summary

In the Linux kernel, the following vulnerability has been resolved: Input: cs40l50-vibra - validate custom data from user space cs40l50_add() copies the custom data of an FF_PERIODIC/FF_CUSTOM effect straight from the ff_effect the user passed to EVIOCSFF, without requiring it to hold anything: work_data.custom_data = memdup_array_user(periodic->custom_data, periodic->custom_len, sizeof(s16)); work_data.custom_len = periodic->custom_len; The driver then reads two words out of that buffer: custom_data[0] as the waveform bank in cs40l50_effect_bank_set(), and custom_data[1] as the index within the bank in cs40l50_effect_index_set(). Neither read is covered by a length check, and custom_len is fully user controlled: - custom_len == 0 makes memdup_array_user() call memdup_user() with a length of zero, which returns ZERO_SIZE_PTR rather than an error, so custom_data[0] dereferences it. - custom_len == 1 allocates two bytes. A bank of ROM or RAM keeps effect->type out of the OWT case, and custom_data[1] is then read one word past the allocation. The bank value itself is also mishandled. It is masked with CS40L50_CUSTOM_DATA_MASK (0xffff) but stored in an s16, so a custom_data[0] of 0x8000 or above wraps to a negative value that passes the "bank_type >= CS40L50_WVFRM_BANK_NUM" test. cs40l50_effect_index_set() indexes vib->dsp.banks[] with it before the switch statement's default case gets a chance to reject it: base_index = vib->dsp.banks[effect->type].base_index; max_index = vib->dsp.banks[effect->type].max_index; Require the two words the driver reads to be present, and hold the masked bank in a u32 so the existing upper-bound test covers the whole range. The da7280 haptic driver already range checks custom_len this way.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/3855b6a11f8a7aceb…
https://git.kernel.org/stable/c/52a818c586ae2c36b…
https://git.kernel.org/stable/c/d38554602a0b04e85…
https://git.kernel.org/stable/c/7d5c576cb1c86047b…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: c38fe1bb5d21c2ce0857965ee06174ee587d6b42 , < 3855b6a11f8a7aceb8181cc08c99afef58517006 (git) Affected: c38fe1bb5d21c2ce0857965ee06174ee587d6b42 , < 52a818c586ae2c36b7324bfaefb547f5e866a8ae (git) Affected: c38fe1bb5d21c2ce0857965ee06174ee587d6b42 , < d38554602a0b04e85fad28ce72c7500cf50d419b (git) Affected: c38fe1bb5d21c2ce0857965ee06174ee587d6b42 , < 7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d (git)	guessed
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/misc/cs40l50-vibra.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3855b6a11f8a7aceb8181cc08c99afef58517006",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            },
            {
              "lessThan": "52a818c586ae2c36b7324bfaefb547f5e866a8ae",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            },
            {
              "lessThan": "d38554602a0b04e85fad28ce72c7500cf50d419b",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            },
            {
              "lessThan": "7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/misc/cs40l50-vibra.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.105",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.46",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-26T14:37:34.942Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006"
        },
        {
          "url": "https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d"
        }
      ],
      "title": "Input: cs40l50-vibra - validate custom data from user space",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80575",
    "datePublished": "2026-08-26T14:37:34.942Z",
    "dateReserved": "2026-08-26T14:34:25.768Z",
    "dateUpdated": "2026-08-26T14:37:34.942Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80575\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-26T15:17:13.530\",\"lastModified\":\"2026-08-26T15:17:13.530\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027s 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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/input/misc/cs40l50-vibra.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c38fe1bb5d21c2ce0857965ee06174ee587d6b42\",\"lessThan\":\"3855b6a11f8a7aceb8181cc08c99afef58517006\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c38fe1bb5d21c2ce0857965ee06174ee587d6b42\",\"lessThan\":\"52a818c586ae2c36b7324bfaefb547f5e866a8ae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c38fe1bb5d21c2ce0857965ee06174ee587d6b42\",\"lessThan\":\"d38554602a0b04e85fad28ce72c7500cf50d419b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c38fe1bb5d21c2ce0857965ee06174ee587d6b42\",\"lessThan\":\"7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/input/misc/cs40l50-vibra.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-80575

Vulnerability from fkie_nvd - Published: 2026-08-26 15:17 - Updated: 2026-08-26 15:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/misc/cs40l50-vibra.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3855b6a11f8a7aceb8181cc08c99afef58517006",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            },
            {
              "lessThan": "52a818c586ae2c36b7324bfaefb547f5e866a8ae",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            },
            {
              "lessThan": "d38554602a0b04e85fad28ce72c7500cf50d419b",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            },
            {
              "lessThan": "7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d",
              "status": "affected",
              "version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/misc/cs40l50-vibra.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027s 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",
  "lastModified": "2026-08-26T15:17:13.530",
  "metrics": {},
  "published": "2026-08-26T15:17:13.530",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-80575 (GCVE-0-2026-80575)

FKIE_CVE-2026-80575

Tags

Sightings

Nomenclature