جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix potential amdxdna_umap lifetime race amdxdna_umap_release() calls the blocking mmu_interval_notifier_remove() before removing the object from abo->mem.umap_list. If aie2_populate_range() runs concurrently, it may obtain a reference to an amdxdna_umap that is being released, leading to a potential use-after-free. Use kref_get_unless_zero() in aie2_populate_range() when acquiring a reference. If the reference count has already dropped to zero, release is in progress and the entry is skipped.

• https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5
• https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb
• https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e