CVE-2026-97995

In the Linux kernel, the following vulnerability has been resolved: virtio_console: do not free control-out buffers on remove __send_control_msg() publishes &portdev->cpkt as the control-out virtqueue cookie. remove_vqs() walks every virtqueue and passes leftover cookies to free_buf(), which treats them as struct port_buffer and reads sgpages. If a control message is still on c_ovq when the device is unbound, free_buf() reads past the ports_device object. KASAN reported slab-out-of-bounds in free_buf(): free_buf remove_vqs virtcons_remove unbind_store The object was the ports_device allocated in virtcons_probe(). Drain c_ovq without freeing. The packet lives in portdev and is released with it.

• https://git.kernel.org/stable/c/177ee901aa2bab02e7f1f8edbb814fd5e386ed62
• https://git.kernel.org/stable/c/894f98e73983f37354214a89a3a7fd35bf9e3072
• https://git.kernel.org/stable/c/a80c33488e0bbe642ed803b13a4ac8078a70b507
• https://git.kernel.org/stable/c/f620c40ea6862feed84deb105568b21ec53a7830