CVE-2026-89523
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7925: cancel pending mlo_pm_work
If the device is reset, suspended or unregistered within that window, the pending work can still run and access vif/bss data that may already be freed, or send MCU commands while the firmware is not available.
Add cancel_delayed_work_sync(&dev->mlo_pm_work) in all relevant teardown and suspend paths:
- mt7925_mac_reset_work() (chip reset recovery) - mt7925e_unregister_device() (PCIe unbind) - mt7925_pci_suspend() (PCIe bus suspend) - mt7925_suspend() (mac80211 suspend) - mt7925u_suspend() (USB bus / runtime suspend)
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This ensures the work is stopped before the device state becomes invalid.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 6
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto principal
T1499.004Application or System Exploitationimpact70 % - Impacto secundario
T1005Data from Local Systemcollection65 %
Escalada local (AV:L, PR:L): acceso a datos liberados y ejecución de comandos MCU tras reset/suspend. Denegación de servicio por acceso a memoria inválida; lectura de datos de interfaz de red en memoria.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2026-89523",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
}
]
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{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"status": "affected",
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{
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{
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],
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7925/mac.c",
"drivers/net/wireless/mediatek/mt76/mt7925/main.c",
"drivers/net/wireless/mediatek/mt76/mt7925/pci.c",
"drivers/net/wireless/mediatek/mt76/mt7925/usb.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"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/mt7925/mac.c",
"drivers/net/wireless/mediatek/mt76/mt7925/main.c",
"drivers/net/wireless/mediatek/mt76/mt7925/pci.c",
"drivers/net/wireless/mediatek/mt76/mt7925/usb.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-11T20:19:35.010",
"references": [
{
"url": "https://git.kernel.org/stable/c/2889e84282dda147f10b10d94cf0efd90a349c53",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5be6d02837d418bc6c805b5cab1b338de6de9ca7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c5e073f2fbfd34d22099a50d96f60990799753e2",
"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: mt7925: cancel pending mlo_pm_work\n\nIf the device is reset, suspended or unregistered within that window,\nthe pending work can still run and access vif/bss data that may already\nbe freed, or send MCU commands while the firmware is not available.\n\nAdd cancel_delayed_work_sync(&dev->mlo_pm_work) in all relevant teardown\nand suspend paths:\n\n - mt7925_mac_reset_work() (chip reset recovery)\n - mt7925e_unregister_device() (PCIe unbind)\n - mt7925_pci_suspend() (PCIe bus suspend)\n - mt7925_suspend() (mac80211 suspend)\n - mt7925u_suspend() (USB bus / runtime suspend)\n\nThis ensures the work is stopped before the device state becomes\ninvalid."
}
],
"lastModified": "2026-09-13T07:17:14.697",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}