CVE-2025-5866

HIGH

RT-Thread 5.1.0 - Improper Restriction of Operations within the Bounds of a Memory Buffer in sys_sigprocmask

Title source: llm

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.

References (4)

Core 4

Core References

Third Party Advisory, VDB Entry vdb-entry technical-description

https://vuldb.com/?id.311625

Permissions Required, VDB Entry signature permissions-required

https://vuldb.com/?ctiid.311625

Third Party Advisory, VDB Entry third-party-advisory

https://vuldb.com/?submit.584127

Exploit, Issue Tracking, Third Party Advisory issue-tracking

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

Scores

CVSS v3 8.0

EPSS 0.0074

EPSS Percentile 49.6%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-119 CWE-129

Status published

Products (1)

rt-thread/rt-thread 5.1.0

Published Jun 09, 2025

Tracked Since Feb 18, 2026