CVE-2025-40355 sysfs: check visibility before changing group attribute ownership

In the Linux kernel, the following vulnerability has been resolved: sysfs: check visibility before changing group attribute ownership Since commit 0c17270f9b92 "net: sysfs: Implement isvisible for physportid, portname, switchid", devchangenetnamespace can hit WARNON when trying to change owner of...

CVE-2025-40355

CVE-2025-40355 pertains to the Linux kernel: sysfs may touch a group attribute ownership before validating visibility, triggering WARN_ON in _dev_change_net_namespace(). The fixes introduce a visibility check (is_visible) before touching the attribute, as described in the related commits (e.g., 0...