CVE-2026-63797

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rpmsg: char: Fix use-after-free on probe error path<br /> <br /> rpmsg_chrdev_probe() stores the newly allocated eptdev in the default<br /> endpoint&amp;#39;s priv pointer before calling rpmsg_chrdev_eptdev_add(). If<br /> rpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while<br /> the default endpoint may still dispatch callbacks with the stale priv<br /> pointer.<br /> <br /> Avoid publishing eptdev through the default endpoint until<br /> rpmsg_chrdev_eptdev_add() succeeds. Messages received before the priv<br /> pointer is published should be ignored by rpmsg_ept_cb(). Flow-control<br /> updates can hit rpmsg_ept_flow_cb() in the same window, so make both<br /> callbacks return success when priv is NULL.