CVE-2025-5866: rt-thread Buffer Overflow — Exploit

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.

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CVSS v3.1 Score

8.0

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-129 CWE-129

Affected Products

Vendor	Product	Versions
rt-thread	rt-thread	All

References

Exploits

https://github.com/RT-Thread/rt-thread/issues/10300

Other References

https://vuldb.com/?ctiid.311625 https://vuldb.com/?id.311625 https://vuldb.com/?submit.584127

Frequently Asked Questions

What is CVE-2025-5866? +

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. It has a CVSS v3.1 base score of 8.0 (HIGH).

How severe is CVE-2025-5866? +

CVE-2025-5866 has a CVSS v3.1 score of 8.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-5866? +

CVE-2025-5866 affects products from rt-thread, specifically: rt-thread. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-5866? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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