RT-Thread 5.1.0 lwp_syscall.c sys_thread_sigprocmask how array index
Summary
A vulnerability, which was classified as critical, has been found in RT-Thread 5.1.0. This affects the function sys_thread_sigprocmask of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument how leads to array index.
This vulnerability is uniquely identified as CVE-2025-5868. No exploit exists.
Details
A vulnerability, which was classified as critical, has been found in RT-Thread 5.1.0. This issue affects the function sys_thread_sigprocmask of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument how with an unknown input leads to a array index vulnerability. Using CWE to declare the problem leads to CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. Impacted is confidentiality, integrity, and availability.
It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-5868. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/09/2025).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-17441). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Product
Name
Version
Website
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 8.0VulDB Meta Temp Score: 7.8
VulDB Base Score: 8.0
VulDB Temp Score: 7.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 8.0
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
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| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Array indexCWE: CWE-129 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Partially
Availability: 🔒
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
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| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
06/08/2025 Advisory disclosed06/08/2025 VulDB entry created
06/09/2025 VulDB entry last update
Sources
Product: github.comAdvisory: 10303
Status: Not defined
CVE: CVE-2025-5868 (🔒)
GCVE (CVE): GCVE-0-2025-5868
GCVE (VulDB): GCVE-100-311627
EUVD: 🔒
Entry
Created: 06/08/2025 19:41Updated: 06/09/2025 11:22
Changes: 06/08/2025 19:41 (53), 06/09/2025 10:43 (30), 06/09/2025 11:22 (1)
Complete: 🔍
Submitter: Zephyr Saxon
Cache ID: 216::103
Submit
Accepted
- Submit #584130: RT-Thread 5.1.0 Improper Handling of Parameters (by Zephyr Saxon)
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
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