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().
How to fix
- Linux Linuxaa7aa8ba40c089762d821e3987aaae19e1f5705c, d479a7711f8ff127946467b910d947bd971b94ed, 9d3569bfdceda69d5ffd5148901e57b69954d9ef, d97a8f3668949a8a9d1f6202f8c53446f2d89aa7, 913feef74354c653f10ecd4631df7618a95c49c2, 3c1e92f75e11a11492b8cb901fceeb9f16ae6415, 4efa313b15925bdd864784865d6585174979294b, 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < aa7aa8ba40c089762d821e3987aaae19e1f5705c, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < d479a7711f8ff127946467b910d947bd971b94ed, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < 9d3569bfdceda69d5ffd5148901e57b69954d9ef, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < d97a8f3668949a8a9d1f6202f8c53446f2d89aa7, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < 913feef74354c653f10ecd4631df7618a95c49c2, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < 3c1e92f75e11a11492b8cb901fceeb9f16ae6415, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < 4efa313b15925bdd864784865d6585174979294b, a352894d07059649398c4769dc8b645e1a1dad88 ≤ v < 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6, 2.6.27 | aa7aa8ba40c089762d821e3987aaae19e1f5705c, d479a7711f8ff127946467b910d947bd971b94ed, 9d3569bfdceda69d5ffd5148901e57b69954d9ef, d97a8f3668949a8a9d1f6202f8c53446f2d89aa7, 913feef74354c653f10ecd4631df7618a95c49c2, 3c1e92f75e11a11492b8cb901fceeb9f16ae6415, 4efa313b15925bdd864784865d6585174979294b, 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6 |
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