CVE-2026-68228

In the Linux kernel, the following vulnerability has been resolved:

media: chips-media: wave5: Move srcbuf Removal to finishencode

During encoder processing, there is a case where the IRQ response could return the buffer back to userspace via v4l2m2mbufdone call. In this time, userspace could queue up this same buffer before startencode removes the index from the ready queue. This would then lead to a case where the buffer in the ready queue could be a self loop due to the WRITE_ONCE(prev->next, new) call in _listadd.

When _listdel is finally called, the loop is already made so nothing points back to ready queue list head and pointers are poisoned.

A buffer should not be marked as DONE before the buffer is removed from m2m ready queue. Move removal entirely to finish_encode.