CVE-2026-74634

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ring-buffer: Prevent subbuf order change when resizing is disabled<br /> <br /> Because ring_buffer_subbuf_order_set() frees buffer pages, we can&amp;#39;t<br /> allow it when resizing is disabled. A non-consuming reader is at risk of<br /> use-after-free (rb_advance_iter()).<br /> <br /> Return -EBUSY on resize_disabled, matching ring_buffer_resize()<br /> behaviour.