CVE-2026-10671

In Zephyr's kernel pipe implementation, the userspace syscall verifier zvrfykpipeinit in kernel/pipe.c used KSYSCALLOBJ which requires the kernel object to already be initialized instead of KSYSCALLOBJNEVERINIT which rejects an already-initialized object. As a result, on CONFIGUSERSPACE builds an...

CVE-2026-10671 User thread can re-initialize an in-use `k_pipe`, corrupting kernel wait queues (`CONFIG_USERSPACE`)

In Zephyr's kernel pipe implementation, the userspace syscall verifier zvrfykpipeinit in kernel/pipe.c used KSYSCALLOBJ which requires the kernel object to already be initialized instead of KSYSCALLOBJNEVERINIT which rejects an already-initialized object. As a result, on CONFIGUSERSPACE builds an...

CVE-2026-10671

CVE-2026-10671 affects Zephyr kernel: the userspace verifier for k_pipe_init used K_SYSCALL_OBJ(), allowing an unprivileged thread with access to a k_pipe object to re-init a live pipe. This re-initialization clears the ring buffer and wait queues without accounting for current blockers, leaving ...

PT-2026-58038

Name of the Vulnerable Software and Affected Versions Zephyr versions 4.1.0 through 4.4.0 Description In the kernel pipe implementation, the userspace syscall verifier z vrfy k pipe init in kernel/pipe.c incorrectly used K SYSCALL OBJ instead of K SYSCALL OBJ NEVER INIT. On builds with CONFIG...