CVE-2026-80939
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot
Since the hardware rfkill polling was introduced, arm64 platforms can panic with an asynchronous SError during warm reboot:
On the reboot path the kernel only runs device_shutdown(), which calls each driver's .shutdown callback; .remove is not invoked. The rtw89 PCI driver had no .shutdown callback, so nothing stopped the rfkill polling work while the platform was tearing the PCIe link down. Once the link is gone, the next MMIO read from the poll handler targets a non-responding device and is reported as a fatal asynchronous SError on arm64.
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Add rtw89_pci_shutdown(), wired to all rtw89 PCI device drivers, which sets a new RTW89_FLAG_SHUTDOWN flag (mirroring the USB RTW89_FLAG_UNPLUGGED pattern). When the flag is set, rtw89_ops_rfkill_poll() returns early, so no MMIO read is issued to the chip after shutdown begins and the SError no longer occurs.
This does not call the full .remove path from .shutdown, to keep the shutdown handler minimal and avoid running the non-idempotent teardown twice.
Detalles técnicos trazas, registros y código del informe original
SError Interrupt on CPU8, code 0x00000000be000011 -- SError
Workqueue: events_power_efficient rfkill_poll [rfkill]
rtw89_pci_ops_read8+0x94/0x160 [rtw89_pci]
rtw89_core_rfkill_poll+0x50/0x1e0 [rtw89_core]
rtw89_ops_rfkill_poll+0x40/0x68 [rtw89_core]
ieee80211_rfkill_poll+0x3c/0x70 [mac80211]
cfg80211_rfkill_poll+0x40/0x2a0 [cfg80211]
rfkill_poll+0x30/0x88 [rfkill]
Kernel panic - not syncing: Asynchronous SError InterruptCVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- 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).
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)
Mostrar
{
"id": "CVE-2026-80939",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
"lessThan": "dfe2b5b2056918d186ad890079a9e7ec1898429a",
"versionType": "git"
},
{
"status": "affected",
"version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
"lessThan": "9693980cd7d2f5b17e5ef5922b922f2e1a770fca",
"versionType": "git"
},
{
"status": "affected",
"version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
"lessThan": "c1f214dd1351244156deb57761b14190a233aef6",
"versionType": "git"
},
{
"status": "affected",
"version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
"lessThan": "667c12782aaf8dd3cb2213e528fe63a73cb63345",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/realtek/rtw89/core.h",
"drivers/net/wireless/realtek/rtw89/mac80211.c",
"drivers/net/wireless/realtek/rtw89/pci.c",
"drivers/net/wireless/realtek/rtw89/pci.h",
"drivers/net/wireless/realtek/rtw89/rtw8851be.c",
"drivers/net/wireless/realtek/rtw89/rtw8852ae.c",
"drivers/net/wireless/realtek/rtw89/rtw8852be.c",
"drivers/net/wireless/realtek/rtw89/rtw8852bte.c",
"drivers/net/wireless/realtek/rtw89/rtw8852ce.c",
"drivers/net/wireless/realtek/rtw89/rtw8922ae.c",
"drivers/net/wireless/realtek/rtw89/rtw8922de.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"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/realtek/rtw89/core.h",
"drivers/net/wireless/realtek/rtw89/mac80211.c",
"drivers/net/wireless/realtek/rtw89/pci.c",
"drivers/net/wireless/realtek/rtw89/pci.h",
"drivers/net/wireless/realtek/rtw89/rtw8851be.c",
"drivers/net/wireless/realtek/rtw89/rtw8852ae.c",
"drivers/net/wireless/realtek/rtw89/rtw8852be.c",
"drivers/net/wireless/realtek/rtw89/rtw8852bte.c",
"drivers/net/wireless/realtek/rtw89/rtw8852ce.c",
"drivers/net/wireless/realtek/rtw89/rtw8922ae.c",
"drivers/net/wireless/realtek/rtw89/rtw8922de.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-11T20:18:58.553",
"references": [
{
"url": "https://git.kernel.org/stable/c/667c12782aaf8dd3cb2213e528fe63a73cb63345",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9693980cd7d2f5b17e5ef5922b922f2e1a770fca",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c1f214dd1351244156deb57761b14190a233aef6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dfe2b5b2056918d186ad890079a9e7ec1898429a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot\n\nSince the hardware rfkill polling was introduced, arm64 platforms can\npanic with an asynchronous SError during warm reboot:\n\n SError Interrupt on CPU8, code 0x00000000be000011 -- SError\n Workqueue: events_power_efficient rfkill_poll [rfkill]\n rtw89_pci_ops_read8+0x94/0x160 [rtw89_pci]\n rtw89_core_rfkill_poll+0x50/0x1e0 [rtw89_core]\n rtw89_ops_rfkill_poll+0x40/0x68 [rtw89_core]\n ieee80211_rfkill_poll+0x3c/0x70 [mac80211]\n cfg80211_rfkill_poll+0x40/0x2a0 [cfg80211]\n rfkill_poll+0x30/0x88 [rfkill]\n Kernel panic - not syncing: Asynchronous SError Interrupt\n\nOn the reboot path the kernel only runs device_shutdown(), which calls\neach driver's .shutdown callback; .remove is not invoked. The rtw89 PCI\ndriver had no .shutdown callback, so nothing stopped the rfkill polling\nwork while the platform was tearing the PCIe link down. Once the link\nis gone, the next MMIO read from the poll handler targets a\nnon-responding device and is reported as a fatal asynchronous SError on\narm64.\n\nAdd rtw89_pci_shutdown(), wired to all rtw89 PCI device drivers, which\nsets a new RTW89_FLAG_SHUTDOWN flag (mirroring the USB\nRTW89_FLAG_UNPLUGGED pattern). When the flag is set,\nrtw89_ops_rfkill_poll() returns early, so no MMIO read is issued to the\nchip after shutdown begins and the SError no longer occurs.\n\nThis does not call the full .remove path from .shutdown, to keep the\nshutdown handler minimal and avoid running the non-idempotent teardown\ntwice."
}
],
"lastModified": "2026-10-03T11:17:41.317",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}