CVE-2025-68376

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> coresight: ETR: Fix ETR buffer use-after-free issue<br /> <br /> When ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed<br /> and enabled again, currently sysfs_buf will point to the newly<br /> allocated memory(buf_new) and free the old memory(buf_old). But the<br /> etr_buf that is being used by the ETR remains pointed to buf_old, not<br /> updated to buf_new. In this case, it will result in a memory<br /> use-after-free issue.<br /> <br /> Fix this by checking ETR&amp;#39;s mode before updating and releasing buf_old,<br /> if the mode is CS_MODE_SYSFS, then skip updating and releasing it.