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CVE-2026-119086— Missing type validation in xQueueSelectFromSet in FreeRTOS-Kernel

Quick assessment

Affected
FreeRTOS FreeRTOS-Kernel
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.

在启用 MPU（内存保护单元）且启用了队列集（queue sets）的 FreeRTOS-Kernel（版本早于 V11.3.3）中，队列集选择系统调用缺少对队列集类型的验证。该漏洞允许本地非特权任务将攻击者控制的数据写入到特权内核栈上超出指针大小对象的区域，从而跨越 MPU 隔离边界影响特权内存。 为修复此问题，用户应升级至 FreeRTOS-Kernel V11.3.3，重新编译并重新刷写受影响的固件。未启用队列集功能的构建版本不受此漏洞影响。

CVSS 6.5 · Medium EPSS 0.15% · P5

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreeRTOS FreeRTOS-Kernel 7.4.0≤ 11.3.2 affected
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I. Basic Information for CVE-2026-119086

Vulnerability Information
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Vulnerability Title
Missing type validation in xQueueSelectFromSet in FreeRTOS-Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
Missing queue-set type validation in the queue-set selection system call in FreeRTOS-Kernel before V11.3.3 on MPU-enabled ports with queue sets enabled allows a local unprivileged task to write actor-controlled data beyond a pointer-sized object on the privileged kernel stack, affecting privileged memory across the MPU isolation boundary. To remediate this issue, users should upgrade to FreeRTOS-Kernel V11.3.3, rebuild, and reflash affected firmware. Builds that do not enable queue sets are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRTOS FreeRTOS-Kernel 7.4.0 ~ 11.3.2 -

II. Public POCs for CVE-2026-119086

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-119086

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Vendor Advisories for CVE-2026-119086 (2)

Vendor Pages for CVE-2026-119086 (1)

IV. Related Vulnerabilities

Same product: FreeRTOS-Kernel
Same vendor: FreeRTOS
Same weakness: CWE-843