CVE-2026-53112

Description

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.

References

• https://git.kernel.org/stable/c/008c456b76e9070979bc0e763897a5d3b0fdd4dc
• https://git.kernel.org/stable/c/039cd522dc70151da13329a5e3ae19b1736f468a
• https://git.kernel.org/stable/c/3c0e8a3179e6325a7dc6ce221aef0e03d854ab4b
• https://git.kernel.org/stable/c/7731b67bd59d1284d150cbe40a47e95a10613234
• https://git.kernel.org/stable/c/aa10a452e34810987fb9f4a047995b30003fb53f