CVE-2026-53109

CVE-2026-53109: In the Linux kernel (PowerPC), a bug in powerpc/pgtable-frag could leave a folio’s active flag set when the last PTE fragment is freed, leading to a bad page state during do_exit(). The fix centers on the reference-counted fragments (pt_frag_refcount) and the pte_free_defer/pte_fr...