{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80937","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.803Z","datePublished":"2026-09-11T19:42:10.822Z","dateUpdated":"2026-10-03T10:56:20.270Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:56:20.270Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy\n\nmt7915_mcu_get_eeprom() copies a fixed EFUSE block into the driver's\ndev->mt76.eeprom.data buffer at the offset reported by the MCU response\n(res->addr, a device-controlled __le32) without checking it against the\nbuffer size. A malicious or malfunctioning device can report an arbitrary\naddress and drive a 16-byte out-of-bounds write past eeprom.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 write is driven by a MediaTek Wi-Fi 6 MCU EFUSE query response (mt7915/mt7916/mt7981/mt7986), 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 an arbitrary res->addr and 16 device-controlled payload bytes; the host then memcpy's MT7915_EEPROM_BLOCK_SIZE bytes to eeprom.data+addr with no race or other condition beyond attacker control.\nPR:N - MCU EEPROM responses are consumed in mt7915_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 mt7915_eeprom_load() during pci_probe/platform probe 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 - Sixteen bytes of device-controlled data are written at a device-chosen offset past the 3584/4096-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 6 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/mt7915/mcu.c"],"versions":[{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"394e8cb56fc732d71041599cdb4e01f82cfd11c5","status":"affected","versionType":"git"},{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"5fdaf7016d7684ef756a229fd5d96b4a140eeb40","status":"affected","versionType":"git"},{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"5f48b0d752a76590e2c613aae5345c2474627d1b","status":"affected","versionType":"git"},{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"44b5adfe49499f53002737f5fe81d608c08122fc","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/mt7915/mcu.c"],"versions":[{"version":"5.8","status":"affected"},{"version":"0","lessThan":"5.8","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.50","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"5.8","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/394e8cb56fc732d71041599cdb4e01f82cfd11c5"},{"url":"https://git.kernel.org/stable/c/5fdaf7016d7684ef756a229fd5d96b4a140eeb40"},{"url":"https://git.kernel.org/stable/c/5f48b0d752a76590e2c613aae5345c2474627d1b"},{"url":"https://git.kernel.org/stable/c/44b5adfe49499f53002737f5fe81d608c08122fc"}],"title":"wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy","x_generator":{"engine":"bippy-1.2.0"}}}}