In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Flush shmem writes before mapping buffers CPU-uncached The shmem layer zeroes out the new pages using cached mappings, and if we don't CPU-flush we might leave dirty cachelines behind, leading to potential data leaks and/or asynchronous buffer corruption when dirty cachelines are evicted.
https://git.kernel.org/stable/c/8355eea2a2e9c323021dfdcb95d7767d382123c4
https://git.kernel.org/stable/c/7a12f9c96d06b145562f76ffb20369b4692f0911
https://git.kernel.org/stable/c/576c930e5e7dcb937648490611a83f1bf0171048