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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2025-5868

A vulnerability, which was classified as critical, has been found in RT-Thread 5.1.0.

HIGH 8.6EPSS 1.21%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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 leads to improper validation of array index.

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/M
EPSS
1.21% probability · 67th percentile
CISA KEV
Not listed
Weakness
CWE-119, CWE-129
Affected
rt-thread/rt-thread
Source
cna@vuldb.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.