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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-25389
• RT-Thread/rt-thread#8283
• https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt
• https://seclists.org/fulldisclosure/2024/Mar/28
• https://security.humanativaspa.it/multiple-vulnerabilities-in-rt-thread-rtos
• http://www.openwall.com/lists/oss-security/2024/03/05/1