CVE-2026-53112
UnknownSummary
A vulnerability has been identified in the Linux kernel that may lead to a use-after-free error in the rtlwifi module. The issue occurs when irq_prepare_bcn_tasklet is not properly terminated before releasing ieee80211_hw resources.
Risk Assessment
Organizations may be exposed to unexpected system behavior, including potential crashes or security breaches due to improper resource management. This could lead to data loss or unauthorized access.
Recommendation
It is recommended to update the Linux kernel to a version that includes a fix for this vulnerability. Additionally, monitor systems for any irregularities related to the rtlwifi module.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet The irq_prepare_bcn_tasklet is initialized in rtl_pci_init() and scheduled when RTL_IMR_BCNINT interrupt is triggered by hardware. But it is never killed in rtl_pci_deinit(). When the rtlwifi card probe fails or is being detached, the ieee80211_hw is deallocated. However, irq_prepare_bcn_tasklet may still be running or pending, leading to use-after-free when the freed ieee80211_hw is accessed in _rtl_pci_prepare_bcn_tasklet(). Similar to irq_tasklet, add tasklet_kill() in rtl_pci_deinit() to ensure that irq_prepare_bcn_tasklet is properly terminated before the ieee80211_hw is released. The issue was identified through static analysis.