CVE-2025-5867

RT-Thread lwp_syscall.c csys_sendto null pointer dereference

8.6 High

A vulnerability classified as critical was found in RT-Thread 5.1.0. This vulnerability affects the function csys_sendto of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument to leads to null pointer dereference.

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

1.21%Up 1.2 points since Jun 9, 2025

What each source reports

CVE List Score used 8.6

RT-Thread lwp_syscall.c csys_sendto null pointer dereference

Record: CVE-2025-5867
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: 7.7 AV:A/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR
Weakness: CWE-476, CWE-404
Updated: 2026-11-02

EUVDEUVD-2025-17443 8.6

Record: EUVD-2025-17443
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-mq4q-q9rw-jvph 8.6

A vulnerability classified as critical was found in RT-Thread 5.1.0. This vulnerability affects...

Record: GHSA-mq4q-q9rw-jvph
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-404, CWE-476
Updated: 2026-11-02

NVD 8.6

Record: CVE-2025-5867
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: 7.7 HighAV:A/AC:L/Au:S/C:C/I:C/A:C
Weakness: CWE-404, CWE-476
Updated: 2026-11-02

OSV 8.6

RT-Thread lwp_syscall.c csys_sendto null pointer dereference

Record: CVE-2025-5867
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-404, CWE-476
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-2025-5867 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 1.21%, the 68th percentile. No source names a fixed version.