What is CVE-2025-5866?

CVE-2025-5866 is a high-severity vulnerability in Rt-thread, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.0/10. Published 2025-06-09.

How severe is CVE-2025-5866?

High severity. CVSS v3 base score is 8.0 out of 10.

Buffer overflow in Rt-thread

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 ar…

Vulnerability class: Buffer Overflow

EPSS: 0.008 (50.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Rt-thread — versions 5.1.0
N/a Rt-thread — versions 5.1.0

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (issue-tracking, Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2025-5866?: CVE-2025-5866 is a high-severity vulnerability in Rt-thread, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.0/10. Published 2025-06-09.
How severe is CVE-2025-5866?: High severity. CVSS v3 base score is 8.0 out of 10.