CVE-2026-80935

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4
https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384
https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:18

Updated : 2026-09-14 13:18

NVD link : CVE-2026-80935

Mitre link : CVE-2026-80935

CVE.ORG link : CVE-2026-80935

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-80935", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "9e5abb5e2ade0b6fd0e47209711115d47a255176", "versionType": "git"}, {"status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "6be59da2063d5b3522bfde8aae0487ec095eb384", "versionType": "git"}, {"status": "affected", "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "13b3c29a782033ce4a230be9e5618032813dbcd4", "versionType": "git"}], "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/mcu.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"status": "unaffected", "version": "0", "lessThan": "6.2", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.52", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/mcu.c"], "defaultStatus": "affected"}]}], "published": "2026-09-11T20:18:57.403", "references": [{"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", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "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->addr, a\ndevice-controlled __le32) and clamps only the copy length, never the\ndestination offset into dev->mt76.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."}], "lastModified": "2026-09-14T13:18:49.783", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}