CVE-2026-53112
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
In the rtlwifi driver in the Linux kernel, there is a use-after-free (UAF) vulnerability due to an unfinished irq_prepare_bcn_tasklet. When the card is detached or initialization fails, ieee80211_hw is freed, but the tasklet may still be running, leading to access to freed memory.
Risk Assessment
An attacker could exploit this vulnerability to escalate privileges or execute arbitrary code in kernel context, leading to full system compromise.
Recommendation
Apply the latest Linux kernel patch that adds a tasklet_kill() call in rtl_pci_deinit() to ensure proper termination of the tasklet before memory release.
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.