EUVD-2026-70652
GHSA-4qmw-8r9m-c656
Severity by source
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local vector, low-privilege pre-placement, but requires a privileged user to trigger the installer (UI:R); scope changes to root (S:C) with full CIA impact.
Primary rating from Vendor (AMZN).
CVSS VectorVendor: AMZN
Lifecycle Timeline
7DescriptionCVE.org
Creation of a temporary file in a directory with insecure permissions in the FPGA management tool installation component in AWS FPGA Development Kit (aws-fpga) before 2.3.4 might allow local users to execute arbitrary code with root privileges via crafted shell content placed at a predictable path in a world-writable temporary directory, which the installation step reads after elevating its own privileges.
To remediate this issue, users should upgrade to version 2.3.4.
AnalysisAI
Privilege escalation to root in the AWS FPGA Development Kit (aws-fpga) before version 2.3.4 is achievable when a local low-privileged user pre-places malicious shell content at the predictable path /tmp/sdk_root_env.exp, which the sdk_setup.sh installation script sources after elevating its own privileges. The root cause (CWE-379) is the installation component writing a shell function file to the world-writable /tmp directory without using secure temporary file practices, making the path guessable and controllable by any local account. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local user account with write access to `/tmp` on the same host where aws-fpga SDK installation is being performed (versions before 2.3.4). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 7.3 (AV:L/AC:L/AT:P/PR:L/UI:N) correctly anchors this as a local-vector, low-privilege-required vulnerability with specific attack requirements (AT:P), though the UI:N metric arguably understates the dependency on a separate privileged user running the installer - reclassifying to UI:A would better reflect that dependency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade aws-fpga to version 2.3.4 or later; the patched release is available at https://github.com/aws/aws-fpga/releases/tag/v2.3.4. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all systems running AWS FPGA Development Kit versions prior to 2.3.4, prioritizing development workstations and CI/CD build servers. …
Sign in for detailed remediation steps and compensating controls.
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