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