CVE-2026-53112
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/008c456b76e9070979bc0e763897a5d3b0fdd4dcPatch
- https://git.kernel.org/stable/c/039cd522dc70151da13329a5e3ae19b1736f468aPatch
- https://git.kernel.org/stable/c/3c0e8a3179e6325a7dc6ce221aef0e03d854ab4bPatch
- https://git.kernel.org/stable/c/7731b67bd59d1284d150cbe40a47e95a10613234Patch
- https://git.kernel.org/stable/c/aa10a452e34810987fb9f4a047995b30003fb53fPatch
- https://git.kernel.org/stable/c/ae10d4a1ab6bcaa1336abb171908a9a365761d3ePatch
- https://git.kernel.org/stable/c/e40873820c9d245ce482faa7ad514ebdb3b8d23dPatch
- https://git.kernel.org/stable/c/fac1079e0fdec6df6d7562c21941587236dc3defPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.