CVE-2026-64276 (GCVE-0-2026-64276)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-08-17 04:52
VLAI
Title
Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count rmi_f30_map_gpios() allocates gpioled_key_map with min(gpioled_count, TRACKSTICK_RANGE_END) == at most 6 entries, but rmi_f30_attention() iterates the full f30->gpioled_count (device query register, range 0..31) and dereferences gpioled_key_map[i], and input->keycodemax is set to the full gpioled_count while input->keycode points at the 6-entry allocation. A device that reports gpioled_count > 6 with GPIO support enabled therefore causes an out-of-bounds read on the attention interrupt and out-of-bounds read/write through the EVIOCGKEYCODE/EVIOCSKEYCODE ioctls, which bound the index only against keycodemax. This is the same defect as the F3A handler, which was copied from F30. Size the keymap for the full gpioled_count; the mapping loop still assigns only the first min(gpioled_count, TRACKSTICK_RANGE_END) entries.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < 8c6d18d61bb6fe0e6edf848413391c590552e8a9 (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < d162a1ead7de404d8b41a093c83ed0db6487cded (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < f0be9eba946e9200b43265e0a748d38bd0a56954 (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < 26c895928d7118436a24f564587cb4aefc40cdd8 (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < 4e3689c26854356f41fbaa1eafa382e58ac79e00 (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < e849c6f51e6877104c765da084e001ec37c8e119 (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < bfe622efecd4ff0a792d0ecd1a8dce535a902f50 (git)
Affected: 3e64fcbdbd10e46dede502d507dbcc104837cd59 , < d577e46785d45484b2ab7e7309c49b18764bf56c (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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              "value": "AV:L - An unprivileged local process that can open the affected /dev/input/event node can reach the flawed table through EVIOCGKEYCODE or EVIOCSKEYCODE; no physical reattachment or network path is required on systems with an affected F30 device.\nAC:L - Once an F30 device reports more than six GPIO/LEDs, attacker-selected indices deterministically trigger two-byte heap out-of-bounds reads or writes. No race or condition outside the attacker\u0027s control is required.\nPR:L - The evdev ioctl path contains no capability or namespace privilege check, so any ordinary user permitted to open the event node can trigger it.\nUI:N - The attacker directly issues the ioctls, and the separate attention path is device-driven; neither requires action by another user.\nS:U - The vulnerable driver and the affected kernel memory share the same security authority. Kernel privilege escalation or code execution does not itself cross a VM, IOMMU, or other scope boundary.\nC:H - EVIOCGKEYCODE returns attacker-selected out-of-bounds u16 values and can disclose multiple adjacent slab words across the available indices. This heap disclosure can expose security-sensitive kernel data and facilitate further exploitation.\nI:H - EVIOCSKEYCODE performs attacker-controlled u16 writes beyond the allocation at selectable offsets. These writes can corrupt adjacent heap objects or metadata and plausibly enable control-flow hijacking.\nA:H - The controlled heap corruption can damage adjacent kernel objects and cause an oops or panic, while the device can also repeatedly trigger the out-of-bounds attention path."
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count\n\nrmi_f30_map_gpios() allocates gpioled_key_map with\nmin(gpioled_count, TRACKSTICK_RANGE_END) == at most 6 entries, but\nrmi_f30_attention() iterates the full f30-\u003egpioled_count (device query\nregister, range 0..31) and dereferences gpioled_key_map[i], and\ninput-\u003ekeycodemax is set to the full gpioled_count while input-\u003ekeycode\npoints at the 6-entry allocation.\n\nA device that reports gpioled_count \u003e 6 with GPIO support enabled\ntherefore causes an out-of-bounds read on the attention interrupt and\nout-of-bounds read/write through the EVIOCGKEYCODE/EVIOCSKEYCODE ioctls,\nwhich bound the index only against keycodemax. This is the same defect\nas the F3A handler, which was copied from F30.\n\nSize the keymap for the full gpioled_count; the mapping loop still\nassigns only the first min(gpioled_count, TRACKSTICK_RANGE_END) entries."
          }
        ],
        "id": "CVE-2026-64276",
        "lastModified": "2026-08-17T05:17:26.747",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-07-25T10:17:08.060",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/26c895928d7118436a24f564587cb4aefc40cdd8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4e3689c26854356f41fbaa1eafa382e58ac79e00"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8c6d18d61bb6fe0e6edf848413391c590552e8a9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/bfe622efecd4ff0a792d0ecd1a8dce535a902f50"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d162a1ead7de404d8b41a093c83ed0db6487cded"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d577e46785d45484b2ab7e7309c49b18764bf56c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e849c6f51e6877104c765da084e001ec37c8e119"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f0be9eba946e9200b43265e0a748d38bd0a56954"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-07T19:38:03+00:00",
      "cve": "CVE-2026-64276",
      "id": "CVE-2026-64276",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:fixed": "762",
      "product_status:known_affected": "50",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64276.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:42:13Z",
      "cve": "CVE-2026-64276",
      "id": "CVE-2026-64276",
      "initial_release_date": "2026-07-25T16:46:47Z",
      "product_status:known_affected": "578",
      "product_status:known_not_affected": "155",
      "product_status:recommended": "214",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64276",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64276.json",
      "version": "9"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


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.