CVE-2025-39836

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> efi: stmm: Fix incorrect buffer allocation method<br /> <br /> The communication buffer allocated by setup_mm_hdr() is later on passed<br /> to tee_shm_register_kernel_buf(). The latter expects those buffers to be<br /> contiguous pages, but setup_mm_hdr() just uses kmalloc(). That can cause<br /> various corruptions or BUGs, specifically since commit 9aec2fb0fd5e<br /> ("slab: allocate frozen pages"), though it was broken before as well.<br /> <br /> Fix this by using alloc_pages_exact() instead of kmalloc().