GHSA-GMWF-MX64-6GVQ
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-10-21 15:41In 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.
{
"affected": [],
"aliases": [
"CVE-2026-80935"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:18:57Z",
"severity": "HIGH"
},
"details": "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": "GHSA-gmwf-mx64-6gvq",
"modified": "2026-10-21T15:41:05Z",
"published": "2026-09-11T21:31:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80935"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/388f471ca4758f644394b681ce97677a4d0e772c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4892be1ef0bbe6db6b13bf46cb79b6706bb5b214"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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Nomenclature
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