UBUNTU-CVE-2026-90398: High severity ubuntu/linux-hwe-edge vulnerability

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix stride mismatch in macphycapsparse() Currently, in ath11kwmitlvmacphycapsparse(), kcalloc() sizes the macphycaps buffer as totphyid len, where len is clamped to min(firmwarelen, sizeof(struct wmimacphycapabilities)). The subsequent memcpy() destination advances by sizeof(full struct) per slot via C pointer arithmetic, not by the clamped len. When firmware sends short TLVs, the second and later slots are written past the end of the allocation. The reader in ath11kpullmacphycapsvcreadyext() also indexes the buffer with full-struct pointer arithmetic, so the allocation must match that stride. Fix by using kzallocobjs(), which derives the element size from the pointer type, making allocation size and pointer stride provably consistent regardless of what len the firmware provides. Compile tested only.