CVE-2026-74728

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> xfs: handle NULL b_addr in xfs_buf_free<br /> <br /> When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with<br /> bp-&gt;b_addr still NULL. The code falls through to the folio_put path<br /> which calls virt_to_folio(NULL), dereferencing an invalid address and<br /> causing a kernel crash.<br /> <br /> Call Trace:<br /> xfs_buf_free+0x25f/0x510<br /> xfs_buf_alloc+0xc98/0x19b0<br /> xfs_buf_find_insert+0x55/0x14d0<br /> xfs_buf_get_map+0x122b/0x17c0<br /> xfbtree_init_leaf_block+0x11c/0x4a0<br /> xfbtree_init+0x1bb/0x460<br /> xrep_rmap_setup_scan+0x100/0x1f0<br /> xrep_rmapbt+0x41/0xc0<br /> <br /> Fix this by skipping folio_put() when bp-&gt;b_addr is NULL.