CVE-2026-23357

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> can: mcp251x: fix deadlock in error path of mcp251x_open<br /> <br /> The mcp251x_open() function call free_irq() in its error path with the<br /> mpc_lock mutex held. But if an interrupt already occurred the<br /> interrupt handler will be waiting for the mpc_lock and free_irq() will<br /> deadlock waiting for the handler to finish.<br /> <br /> This issue is similar to the one fixed in commit 7dd9c26bd6cf ("can:<br /> mcp251x: fix deadlock if an interrupt occurs during mcp251x_open") but<br /> for the error path.<br /> <br /> To solve this issue move the call to free_irq() after the lock is<br /> released. Setting `priv-&gt;force_quit = 1` beforehand ensure that the IRQ<br /> handler will exit right away once it acquired the lock.