{"id":"CVE-2026-99097","published":"2026-10-26T15:16:48.750","lastModified":"2026-10-26T15:16:48.750","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()\n\ntee_dyn_shm_alloc_helper() derives nr_pages from a caller-supplied size\nand passes it to alloc_pages_exact() without checking it. For size == 0\nnr_pages is 0, and alloc_pages_exact(0) calls get_order(0), which is\ndocumented as undefined and returns BITS_PER_LONG - PAGE_SHIFT. The page\nallocator then trips its order > MAX_PAGE_ORDER warning and fails the\nallocation; on a panic_on_warn kernel that ends the boot.\n\nThis can be triggered by TEE_IOC_SHM_ALLOC with struct\ntee_ioctl_shm_alloc_data where size is 0.\n\nReject a zero page count, as register_shm_helper() already does for the\nregister path.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/65cb86860a80ffc6af897d53f5bd4b1733bca0ec","tags":[]},{"url":"https://git.kernel.org/stable/c/b7f925fd5226deb953c8dcdc9677d3fcc2717c00","tags":[]},{"url":"https://git.kernel.org/stable/c/c2a97703359e25ec7ef8b2b0ef32fb3982add90a","tags":[]},{"url":"https://git.kernel.org/stable/c/e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}