CVE-2025-5866

8.6 highEPSS 0.8%

High (8.6) in rt-thread rt-thread. EPSS 0.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.6 high

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8 critical

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
CWEs: CWE-129, CWE-119
Published: 2025-06-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

rt-thread:rt-thread

References

https://github.com/RT-Thread/rt-thread/issues/10300
https://vuldb.com/?ctiid.311625
https://vuldb.com/?id.311625
https://vuldb.com/?submit.584127

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