{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80935", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.802Z", "datePublished": "2026-09-11T19:42:09.286Z", "dateUpdated": "2026-10-21T12:47:15.492Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:47:15.492Z" }, "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "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->valid and an arbitrary event->addr; the host then memcpy's 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/mediatek/mt76/mt7996/mcu.c" ], "versions": [ { "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "4892be1ef0bbe6db6b13bf46cb79b6706bb5b214", "status": "affected", "versionType": "git" }, { "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "388f471ca4758f644394b681ce97677a4d0e772c", "status": "affected", "versionType": "git" }, { "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "9e5abb5e2ade0b6fd0e47209711115d47a255176", "status": "affected", "versionType": "git" }, { "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "6be59da2063d5b3522bfde8aae0487ec095eb384", "status": "affected", "versionType": "git" }, { "version": "98686cd21624c75a043e96812beadddf4f6f48e5", "lessThan": "13b3c29a782033ce4a230be9e5618032813dbcd4", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/mediatek/mt76/mt7996/mcu.c" ], "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4892be1ef0bbe6db6b13bf46cb79b6706bb5b214" }, { "url": "https://git.kernel.org/stable/c/388f471ca4758f644394b681ce97677a4d0e772c" }, { "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" } } } }