Medium
armnn — security advisory
In Arm ArmNN through 2026-03-27, an integer overflow in TensorShape::GetNumElements() in armnn/Tensor.cpp allows a crafted TFLite model file to bypass buffer size validation and trigger a heap-based buffer over-read during model optimization. The overflow occurs when multiplying tensor dimensions using 32-bit unsigned arithmetic without overflow detection, causing GetNumBytes() to return an understated allocation size. During Optimize()->InferOutputShapes(), the BatchToSpaceNdLayer reads beyond the allocated buffer.
- Products
- armnn
- Affected versions
- 20.08-12, 20.08-13, 23.08-2, 23.08-3, 23.08-4, 23.08-4.1, 23.08-4.1~exp1, 23.08-4.1~exp2, 23.08-5, 23.08-5.1, 23.08-5.2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-42627
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 23:48 UTC · Revision 1
Source evidence
In Arm ArmNN through 2026-03-27, an integer overflow in TensorShape::GetNumElements() in armnn/Tensor.cpp allows a crafted TFLite model file to bypass buffer size validation and trigger a heap-based buffer over-read during model optimization. The overflow occurs when multiplying tensor dimensions using 32-bit unsigned arithmetic without overflow detection, causing GetNumBytes() to return an understated allocation size. During Optimize()->InferOutputShapes(), the BatchToSpaceNdLayer reads beyond the allocated buffer.
osv:DEBIAN-CVE-2026-42627
armnn
Fixed versions: Not specified
armnn
Fixed versions: Not specified
armnn
Fixed versions: Not specified
Complete source record
{
"id": "9bf2196153504f43bb267f3d67f66118308f2e9012f63634ae311311ab65bd77",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-42627",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-42627",
"summary": "In Arm ArmNN through 2026-03-27, an integer overflow in TensorShape::GetNumElements() in armnn/Tensor.cpp allows a crafted TFLite model file to bypass buffer size validation and trigger a heap-based buffer over-read during model optimization. The overflow occurs when multiplying tensor dimensions using 32-bit unsigned arithmetic without overflow detection, causing GetNumBytes() to return an understated allocation size. During Optimize()->InferOutputShapes(), the BatchToSpaceNdLayer reads beyond the allocated buffer.",
"evidence": "osv:DEBIAN-CVE-2026-42627",
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],
"modified": "2026-10-17T05:00:07.138107866Z",
"provider": "osv",
"upstream": [
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"references": [
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"evidence": "/upstream"
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 351886,
"published_at": "2026-05-22T18:16:22.593+00:00"
}