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, arm…
Overview
CVE-2026-80939 is a known-severity vulnerability. It was published on September 11, 2026.
Technical description
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:
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 Interrupt
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. On
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
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Frequently asked questions
What is CVE-2026-80939?
CVE-2026-80939 is a known-severity vulnerability. It was published on September 11, 2026.
How severe is CVE-2026-80939?
CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.
How do I fix or remediate CVE-2026-80939?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-80939?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80939 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.