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CVE-2026-14605— RT-Thread ls1c CAN ls1c_can.h recvmsg stack-based overflow

Quick assessment

Affected
n/a RT-Thread
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RT-Thread是RT-Thread组织开源的一个开源物联网实时操作系统(RTOS)。 RT-Thread 5.0.2及之前版本存在缓冲区错误漏洞，该漏洞源于组件ls1c CAN Handler中库文件bsp/loongson/ls1cdev/libraries/ls1c_can.h的函数recvmsg存在栈缓冲区溢出，可能导致攻击者需要本地访问来利用此漏洞。以下版本受到影响：5.0.0版本、5.0.1版本和5.0.2版本。

CVSS 7.8 · High EPSS 0.20% · P9

Affected Version Matrix 3

VendorProduct Version RangeStatus
n/a RT-Thread 5.0.0 affected
5.0.1 affected
5.0.2 affected
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I. Basic Information for CVE-2026-14605

Vulnerability Information
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Vulnerability Title
RT-Thread ls1c CAN ls1c_can.h recvmsg stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in RT-Thread up to 5.0.2. Affected by this vulnerability is the function recvmsg in the library bsp/loongson/ls1cdev/libraries/ls1c_can.h of the component ls1c CAN Handler. Such manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
RT-Thread 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RT-Thread是RT-Thread组织开源的一个开源物联网实时操作系统(RTOS)。 RT-Thread 5.0.2及之前版本存在缓冲区错误漏洞，该漏洞源于组件ls1c CAN Handler中库文件bsp/loongson/ls1cdev/libraries/ls1c_can.h的函数recvmsg存在栈缓冲区溢出，可能导致攻击者需要本地访问来利用此漏洞。以下版本受到影响：5.0.0版本、5.0.1版本和5.0.2版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- RT-Thread 5.0.0 cpe:2.3:a:rt-thread:rt-thread:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-14605

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III. Intelligence Information for CVE-2026-14605

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Proof of Concept for CVE-2026-14605 (1)

Other References for CVE-2026-14605 (1)

Same Patch Batch · n/a · 2026-07-03 · 3 CVEs total

CVE-2026-14606 7.8 HIGH RT-Thread SWM341 CAN SWM341.h CAN_Receive stack-based overflow
CVE-2026-14607 5.5 MEDIUM RT-Thread lwp_syscall.c sys_getaddrinfo memory corruption

IV. Related Vulnerabilities

Same product: RT-Thread
Same vendor: n/a
Same weakness: CWE-121

V. Comments for CVE-2026-14605

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