Vulnerability · Published Jun 9, 2025 · Assigned by VulDB
CVE-2025-5866RT-Thread lwp_syscall.c sys_sigprocmask array index
High 8.0
In plain English
A high-severity memory corruption in RT-Thread. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.9%top 40.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
Weakness: CWE-129, CWE-119 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R
References
- VDB-311625 | RT-Thread lwp_syscall.c sys_sigprocmask array index vdb-entry, technical-description
- VDB-311625 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #584127 | RT-Thread 5.1.0 Improper Handling of Parameters third-party-advisory
- https://github.com/RT-Thread/rt-thread/issues/10300 issue-tracking