What’s Vulnerable › Vulnerabilities

CVE-2025-5866: RT-Thread lwp_syscall.c sys_sigprocmask array index

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-09 · updated 2026-06-17
• Weakness: CWE-119

Description

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.

Affected products

• RT-Thread: 5.1.0

References

• https://github.com/RT-Thread/rt-thread/issues/10300
• https://vuldb.com/?ctiid.311625
• https://vuldb.com/?id.311625
• https://vuldb.com/?submit.584127

Get alerted when CVE-2025-5866 or the next vulnerability affects your stack