CVE-2026-68474

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access() spufs_mem_mmap_access() computes the local store offset as address - vma->vm_start, but bounds-checks it against vma->vm_end instead of the local store size. On 64-bit, offset is always well below vma->vm_end, so the clamp never fires and len stays unbounded against the LS_SIZE buffer returned by ctx->ops->get_ls(). Reject offsets at or beyond LS_SIZE and clamp len to the remaining space, mirroring the guard already used by spufs_mem_mmap_fault() and spufs_ps_fault().

References

• https://git.kernel.org/stable/c/3c1e92f75e11a11492b8cb901fceeb9f16ae6415
• https://git.kernel.org/stable/c/47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6
• https://git.kernel.org/stable/c/4efa313b15925bdd864784865d6585174979294b
• https://git.kernel.org/stable/c/913feef74354c653f10ecd4631df7618a95c49c2
• https://git.kernel.org/stable/c/9d3569bfdceda69d5ffd5148901e57b69954d9ef