A vulnerability, which was classified as critical, was found in RT-Thread up to 5.1.0. This affects the function sys_device_open/sys_device_read/sys_device_control/sys_device_init/sys_device_close/sys_device_write of the file components/drivers/core/device.c. The manipulation leads to memory corruption. It is possible to launch the attack on the local host. The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability, which was classified as critical, was found in RT-Thread 5.1.0. Affected is the function sys_recvfrom of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument from leads to memory corruption.

A vulnerability, which was classified as critical, has been found in RT-Thread 5.1.0. This issue affects the function sys_thread_sigprocmask of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument how leads to improper validation of array index.

A vulnerability classified as critical was found in RT-Thread 5.1.0. This vulnerability affects the function csys_sendto of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument to leads to null pointer dereference.

A vulnerability classified as critical has been found in RT-Thread 5.1.0. This affects the function sys_sigprocmask of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument how leads to improper validation of array index.

A vulnerability was found in RT-Thread 5.1.0. It has been rated as critical. Affected by this issue is the function sys_select of the file rt-thread/components/lwp/lwp_syscall.c of the component Parameter Handler. The manipulation of the argument timeout leads to memory corruption. The vendor explains, that "[t]he timeout parameter should be checked to check if it can be accessed correctly in kernel mode and used temporarily in kernel memory."

A vulnerability classified as problematic was found in RT-Thread up to 5.1.0. Affected by this vulnerability is the function sys_device_close/sys_device_control/sys_device_find/sys_device_init/sys_device_open/sys_device_read/sys_device_register/sys_device_write/sys_event_delete/sys_event_recv/sys_event_send/sys_mb_delete/sys_mb_recv/sys_mb_send/sys_mb_send_wait/sys_mq_recv/sys_mq_send/sys_mq_urgent/sys_mutex_delete/sys_mutex_release/sys_mutex_take/sys_rt_timer_control/sys_rt_timer_delete/sys_rt_timer_start/sys_rt_timer_stop/sys_sem_delete/sys_sem_release/sys_sem_take/sys_shmat/sys_shmdt/sys_thread_create/sys_thread_delete/sys_thread_startup/sys_timer_delete/sys_timer_gettime/sys_timer_settime of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument arg[0] leads to information disclosure. An attack has to be approached locally.

A buffer overflow occurs in utilities/rt-link/src/rtlink.c in RT-Thread through 5.0.2.

A buffer overflow occurs in utilities/ymodem/ry_sy.c in RT-Thread through 5.0.2 because of an incorrect sprintf call or a missing '\0' character.

A stack buffer overflow occurs in net/at/src/at_server.c in RT-Thread through 5.0.2.

An out-of-bounds access occurs in utilities/var_export/var_export.c in RT-Thread through 5.0.2.

A stack buffer overflow occurs in libc/posix/ipc/mqueue.c in RT-Thread through 5.0.2.

A heap buffer overflow occurs in finsh/msh_file.c and finsh/msh.c in RT-Thread through 5.0.2.

RT-Thread through 5.0.2 generates random numbers with a weak algorithm of "seed = 214013L * seed + 2531011L; return (seed >> 16) & 0x7FFF;" in calc_random in drivers/misc/rt_random.c.

drivers/wlan/wlan_mgmt,c in RT-Thread through 5.0.2 has an integer signedness error and resultant buffer overflow.

A heap buffer overflow occurs in the dfs_v2 romfs filesystem RT-Thread through 5.0.2.

A heap buffer overflow occurs in dfs_v2 dfs_file in RT-Thread through 5.0.2.