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.
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-119086",
"assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5",
"assignerShortName": "AMZN",
"dateUpdated": "2026-10-30T17:36:37.406Z",
"dateReserved": "2026-10-29T13:18:10.340Z",
"datePublished": "2026-10-30T17:33:51.535Z",
"state": "PUBLISHED"
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},
"title": "Missing type validation in xQueueSelectFromSet in FreeRTOS-Kernel",
"descriptions": [
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"lang": "en",
"value": "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.\n\n\n\nTo 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.",
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"value": "<p>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.</p><p>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.</p>"
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"affected": [
{
"vendor": "FreeRTOS",
"product": "FreeRTOS-Kernel",
"defaultStatus": "unaffected",
"versions": [
{
"version": "7.4.0",
"status": "affected",
"versionType": "custom",
"lessThanOrEqual": "11.3.2"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-843 Access of resource using incompatible type ('type confusion')",
"cweId": "CWE-843",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"description": "CWE-121 Stack-based buffer overflow",
"cweId": "CWE-121",
"type": "CWE"
}
]
}
],
"references": [
{
"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.3",
"tags": [
"release-notes",
"patch"
]
},
{
"url": "https://aws.amazon.com/security/security-bulletins/2026-158-aws/",
"tags": [
"vendor-advisory"
]
},
{
"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-56j9-g43f-8g6v",
"tags": [
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"impacts": [
{
"capecId": "CAPEC-100",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-100 Overflow Buffers"
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]
},
{
"capecId": "CAPEC-129",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-129 Pointer Manipulation"
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}
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"value": "GENERAL"
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"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE",
"baseScore": 6.5,
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