Home/CVE/A vulnerability classified as critical has been found in RT-Thread 5.1.0. This affects the function sys_sigprocmask of t
CVE

CVE-2025-5866

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

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.

HIGH · CVSS 8 EPSS 0.01174
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-129Improper Validation of Array Index
CWE-129Improper Validation of Array Index
▤

Affected Products & Versions

1
rt-threadall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · 10300github.com
▣

Scoring & Timeline

8
HIGH · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jun 2025 · 07:15 AM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://vuldb.com/?ctiid.311625Permissions RequiredVDB Entry
https://vuldb.com/?id.311625Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.584127Third Party AdvisoryVDB Entry
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