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Vulnerability · Published May 22, 2026 · Assigned by mitre

CVE-2026-42627

Medium 6.2

In plain English

A medium-severity integer overflow in the armnn package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.1%top 97.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12armnnno fix listedDEBIAN-CVE-2026-42627
Debian:13armnnno fix listedDEBIAN-CVE-2026-42627
Debian:14armnnno fix listedDEBIAN-CVE-2026-42627
Ubuntu:22.04:LTSarmnnno fix listedUBUNTU-CVE-2026-42627
Ubuntu:24.04:LTSarmnnno fix listedUBUNTU-CVE-2026-42627
Ubuntu:25.10armnnno fix listedUBUNTU-CVE-2026-42627
Ubuntu:26.10armnnno fix listedUBUNTU-CVE-2026-42627

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References