kernel: cifs: Fix the smbd_response slab to allow usercopy

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix the smbdresponse slab to allow usercopy The handling of received data in the smbdirect client code involves using copytoiter to copy data from the smbdreponse struct's packet trailer to a folioq buffer provided by...

CVE-2025-38523

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix the smbdresponse slab to allow usercopy The handling of received data in the smbdirect client code involves using copytoiter to copy data from the smbdreponse struct's packet trailer to a folioq buffer provided by...

CVE-2025-38523

CVE-2025-38523 affects the Linux kernel CIFS/SMB client path. The issue stems from the smbd_response slab’s packet trailer not being marked as allowed for usercopy, causing kernel memory exposure checks in copy_to_iter() to trip when HARDENED_USERCOPY is enabled. The fix is in the kernel by confi...