CVE-2025-5866

RT-Thread lwp_syscall.c sys_sigprocmask array index

8.6 High

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.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.91%Up 0.9 points since Jun 9, 2025

What each source reports

CVE List Score used 8.6

RT-Thread lwp_syscall.c sys_sigprocmask array index

Record: CVE-2025-5866
CVSS 4.0: 8.6 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X
CVSS 3.1: 8.0 HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R
CVSS 3.0: 8.0 HighCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R
CVSS 2.0: 7.4 AV:A/AC:M/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR
Weakness: CWE-129, CWE-119
Updated: 2026-11-02

EUVDEUVD-2025-17438 8.6

Record: EUVD-2025-17438
CVSS 4.0: 8.6 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X
Updated: 2026-11-02

GitHub AdvisoriesGHSA-xxqp-4rfr-9px7 8.6

A vulnerability classified as critical has been found in RT-Thread 5.1.0. This affects the...

Record: GHSA-xxqp-4rfr-9px7
CVSS 4.0: 8.6 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.0 HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119, CWE-129
Updated: 2026-11-02

NVD 8.6

Record: CVE-2025-5866
CVSS 4.0: 8.6 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.0 HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.4 HighAV:A/AC:M/Au:S/C:C/I:C/A:C
Weakness: CWE-119, CWE-129
Updated: 2026-11-02

OSV 8.6

RT-Thread lwp_syscall.c sys_sigprocmask array index

Record: CVE-2025-5866
CVSS 4.0: 8.6 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X
Weakness: CWE-119, CWE-129
Updated: 2026-11-02

Affected products

rt-thread

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-5866 is a high vulnerability (CVSS 8.6) in Rt-thread, published June 9, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.91%, the 60th percentile. No source names a fixed version.