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EVE Freely Allocates Buffer on The Stack With Data From Socket

Moderate severity GitHub Reviewed Published Feb 4, 2026 in lf-edge/eve • Updated Feb 4, 2026

Package

gomod github.com/lf-edge/eve (Go)

Affected versions

< 0.0.0-20230519072751-977f42b07fa9

Patched versions

0.0.0-20230519072751-977f42b07fa9

Description

Impact

VTPM server listens on port 8877, exposing limited TPM functionality. The server reads 4 bytes as a uint32 size header, then allocates that amount on the stack for incoming data. This allows Denial of Service attacks against the vTPM service.

An workload (a container or VM) running on EVE-OS can use this to generate a DOS against the vTPM service.

Patches

Fixed in 9.4.3-lts and 10.1.0

Workarounds

None

References

@eriknordmark eriknordmark published to lf-edge/eve Feb 4, 2026
Published to the GitHub Advisory Database Feb 4, 2026
Reviewed Feb 4, 2026
Last updated Feb 4, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(25th percentile)

Weaknesses

Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. Learn more on MITRE.

Memory Allocation with Excessive Size Value

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Learn more on MITRE.

CVE ID

CVE-2023-43632

GHSA ID

GHSA-6jp5-grgh-jw42

Source code

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