CVE-2026-80555

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> s390/vfio_ccw: Free all memory if cp_init() fails<br /> <br /> The routine cp_free() is called to unpin/free any memory once an I/O<br /> is completed successfully, or if cp_prefetch() fails. But if cp_init()<br /> fails, and cp-&gt;initialized is not enabled, the same routine cannot be<br /> used to free all the memory.<br /> <br /> An attempt to address this exists in ccwchain_handle_ccw(), where a<br /> single call to ccwchain_free() is made for the currently-processed<br /> CCW segment. But this will leak other segments (created as a result<br /> of a Transfer in Channel) that had been allocated as part of the same<br /> channel program.<br /> <br /> Address this by performing the cleanup outside of the recursive<br /> ccwchain_handle_ccw()/ccwchain_loop_tic() logic.