Vulnerability-Lookup

FKIE_CVE-2021-47083

Vulnerability from fkie_nvd - Published: 2024-03-04 18:15 - Updated: 2026-08-04 10:16

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: pinctrl: mediatek: fix global-out-of-bounds issue When eint virtual eint number is greater than gpio number, it maybe produce 'desc[eint_n]' size globle-out-of-bounds issue.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/441d3873664d170982922c5d2fc01fa89d9439ed	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f373298e1bf0c6ea097c0bcc558dc43ad53e421f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fb563baa3eb8e7a15f2cff3c2695e2cca0493e69	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/441d3873664d170982922c5d2fc01fa89d9439ed	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/f373298e1bf0c6ea097c0bcc558dc43ad53e421f	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/fb563baa3eb8e7a15f2cff3c2695e2cca0493e69	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.16
linux	linux_kernel	5.16
linux	linux_kernel	5.16
linux	linux_kernel	5.16
linux	linux_kernel	5.16
linux	linux_kernel	5.16

JSON

To clipboard

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CVE-2021-47083 (GCVE-0-2021-47083)

Vulnerability from cvelistv5 – Published: 2024-03-04 18:06 – Updated: 2026-08-05 08:45

Title

pinctrl: mediatek: fix global-out-of-bounds issue

Summary

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-04 19:54 UTC

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/f373298e1bf0c6ea0…
https://git.kernel.org/stable/c/441d3873664d17098…
https://git.kernel.org/stable/c/fb563baa3eb8e7a15…
https://git.kernel.org/stable/c/2d5446da5acecf9c6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fb5fa8dc151b2364c975a9070eedb28a354a995a , < f373298e1bf0c6ea097c0bcc558dc43ad53e421f (git) Affected: fb5fa8dc151b2364c975a9070eedb28a354a995a , < 441d3873664d170982922c5d2fc01fa89d9439ed (git) Affected: fb5fa8dc151b2364c975a9070eedb28a354a995a , < fb563baa3eb8e7a15f2cff3c2695e2cca0493e69 (git) Affected: fb5fa8dc151b2364c975a9070eedb28a354a995a , < 2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d (git)
Linux	Linux	Affected: 4.20 Unaffected: 0 , < 4.20 (semver) Unaffected: 5.4.169 , ≤ 5.4.* (semver) Unaffected: 5.10.89 , ≤ 5.10.* (semver) Unaffected: 5.15.12 , ≤ 5.15.* (semver) Unaffected: 5.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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              "value": "AV:L - The OOB is in MediaTek pinctrl EINT\u2192GPIO translation (`mtk_xt_get_gpio_n`), reached when a local caller requests an IRQ on a virtual GPIO (eint_n \u2265 npins) via `/dev/gpiochipN` line-event ioctls \u2192 `gpiod_to_irq` \u2192 `request_threaded_irq` \u2192 `mtk_eint_irq_request_resources`, not via network or physical plug-in paths.\nAC:L - On SoCs with virtual EINTs (e.g. mt8195 GPIO156\u2192eint 216 with npins=165), requesting edge detection on that line always indexes `desc[eint_n]` past the pin table; the attacker fully controls the trigger with no race or uncontrollable layout dependency.\nPR:L - The gpio chardev ioctl path has no capability check\u2014only DAC on `/dev/gpiochipN`, which on MediaTek phones, Chromebooks, IoT, and factory systems is commonly granted to non-root (gpio group/seat), matching prior gpiochip scoring (e.g. CVE-2022-48660); user-namespace root is not required.\nUI:N - The attacker opens the gpiochip device and issues the line-event/edge ioctl themselves; no separate victim action is required.\nS:U - Impact is confined to host-kernel memory safety within the same OS privilege domain; this is not a VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - The bug is a global out-of-bounds read of `desc[eint_n]` (and follow-on pin-desc fields on the false-match path); per kernel OOB-read guidance this is Confidentiality High.\nI:N - The defect itself is an OOB read with no OOB write; a false greedy match yields gpio_n \u2265 ngpio and fails `gpiochip_lock_as_irq` before `set_gpio_as_eint`/`mtk_hw_set_value`, so there is no write or control-flow integrity primitive.\nA:H - Global OOB access is a kernel memory-safety violation that KASAN/hardened builds treat as oops-class failures, and a false-match path can drive `mtk_hw_get_value` with garbage register indices producing further faults, so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:45:54.954Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f373298e1bf0c6ea097c0bcc558dc43ad53e421f"
        },
        {
          "url": "https://git.kernel.org/stable/c/441d3873664d170982922c5d2fc01fa89d9439ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb563baa3eb8e7a15f2cff3c2695e2cca0493e69"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d"
        }
      ],
      "title": "pinctrl: mediatek: fix global-out-of-bounds issue",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47083",
    "datePublished": "2024-03-04T18:06:20.100Z",
    "dateReserved": "2024-02-29T22:33:44.298Z",
    "dateUpdated": "2026-08-05T08:45:54.954Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.