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Segmentation fault in v128.store instruction

Moderate
lum1n0us published GHSA-2f2p-wf5w-82qr Nov 25, 2025

Package

iwasm

Affected versions

<=2.4.3

Patched versions

None

Description

Current State

Run the following command:

iwasm/iwasm --interp -f main corpus/0_v128.wasm
Observed output:

unhandled SIGSEGV, si_addr: (nil)
Aborted (core dumped)
0_v128.wasm.txt

Reproduction steps

Save the attached WASM file: 0_v128.wasm
Run the command:
iwasm/iwasm --interp -f main corpus/0_v128.wasm
Observe segmentation fault

IWASM Version or Commit you used

2.4.3

Operating system information

Ubuntu 20.04

Hardware Architecture

amd64 (x86_64)

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
High
Privileges required
None
User interaction
Required
Scope
Unchanged
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:H/PR:N/UI:R/S:U/C:N/I:N/A:H

CVE ID

CVE-2025-64704

Weaknesses

No CWEs

Credits