Vulnerability-Lookup

FKIE_CVE-2026-80935

Vulnerability from fkie_nvd - Published: 2026-09-11 20:18 - Updated: 2026-09-14 13:18

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block copy from the address reported by the MCU response (event->addr, a device-controlled __le32) and clamps only the copy length, never the destination offset into dev->mt76.eeprom.data. A malicious or malfunctioning device can report an arbitrary address and drive an out-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past eeprom.data. Reject a response whose address would place the copy outside eeprom.data before deriving the destination pointer. Devices that echo the requested in-bounds offset are unaffected.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mcu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9e5abb5e2ade0b6fd0e47209711115d47a255176",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "6be59da2063d5b3522bfde8aae0487ec095eb384",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "13b3c29a782033ce4a230be9e5618032813dbcd4",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mcu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\nwifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy\n\nmt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block\ncopy from the address reported by the MCU response (event-\u003eaddr, a\ndevice-controlled __le32) and clamps only the copy length, never the\ndestination offset into dev-\u003emt76.eeprom.data. A malicious or\nmalfunctioning device can report an arbitrary address and drive an\nout-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past\neeprom.data.\n\nReject a response whose address would place the copy outside eeprom.data\nbefore deriving the destination pointer. Devices that echo the requested\nin-bounds offset are unaffected."
    }
  ],
  "id": "CVE-2026-80935",
  "lastModified": "2026-09-14T13:18:49.783",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-11T20:18:57.403",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-80935 (GCVE-0-2026-80935)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:42 – Updated: 2026-09-14 11:59

Title

wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

Summary

Severity

8.8 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd…
https://git.kernel.org/stable/c/6be59da2063d5b352…
https://git.kernel.org/stable/c/13b3c29a782033ce4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < 9e5abb5e2ade0b6fd0e47209711115d47a255176 (git) Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < 6be59da2063d5b3522bfde8aae0487ec095eb384 (git) Affected: 98686cd21624c75a043e96812beadddf4f6f48e5 , < 13b3c29a782033ce4a230be9e5618032813dbcd4 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mcu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9e5abb5e2ade0b6fd0e47209711115d47a255176",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "6be59da2063d5b3522bfde8aae0487ec095eb384",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            },
            {
              "lessThan": "13b3c29a782033ce4a230be9e5618032813dbcd4",
              "status": "affected",
              "version": "98686cd21624c75a043e96812beadddf4f6f48e5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mcu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy\n\nmt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block\ncopy from the address reported by the MCU response (event-\u003eaddr, a\ndevice-controlled __le32) and clamps only the copy length, never the\ndestination offset into dev-\u003emt76.eeprom.data. A malicious or\nmalfunctioning device can report an arbitrary address and drive an\nout-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past\neeprom.data.\n\nReject a response whose address would place the copy outside eeprom.data\nbefore deriving the destination pointer. Devices that echo the requested\nin-bounds offset are unaffected."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The OOB copy is driven by a MediaTek Wi-Fi 7 MCU EEPROM query response (mt7996/mt7992/mt7990), not a routed IP service; the highest reasonable exposure is an adjacent attacker who can drive malicious firmware or device behavior on the local radio.\nAC:L - A malicious MCU response can set event-\u003evalid and an arbitrary event-\u003eaddr; the host then memcpy\u0027s up to MT7996_EXT_EEPROM_BLOCK_SIZE (1024) device-controlled bytes to eeprom.data+addr with no race or other condition beyond attacker control.\nPR:N - MCU EEPROM responses are consumed in mt7996_eeprom_load() during driver bring-up with no OS credential, capability, or Wi-Fi authentication check; an adjacent attacker needs no local account.\nUI:N - The copy runs automatically in mt7996_eeprom_load() during pci_probe/register after firmware load; no victim action such as mounting a filesystem or opening a file is required.\nS:U - The write corrupts host kernel heap around the mt76 EEPROM buffer and is standard kernel memory corruption, not a VM escape, IOMMU bypass, or other crossed security authority.\nC:H - Attacker-controlled destination offset and payload are kernel memory corruption that can overwrite adjacent objects and pointers and be leveraged for information disclosure, so confidentiality impact is high.\nI:H - Up to 1024 bytes of device-controlled data are written at a device-chosen offset past the 7680-byte eeprom.data allocation, an out-of-bounds write primitive that can yield arbitrary kernel writes or control-flow hijacking.\nA:H - An unbounded kernel heap write during EEPROM init can oops, panic, or hang the host, a high availability impact on Wi-Fi 7 APs, routers, and workstations."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T11:59:01.143Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176"
        },
        {
          "url": "https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384"
        },
        {
          "url": "https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4"
        }
      ],
      "title": "wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80935",
    "datePublished": "2026-09-11T19:42:09.286Z",
    "dateReserved": "2026-08-26T14:34:25.802Z",
    "dateUpdated": "2026-09-14T11:59:01.143Z",
    "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.