SB2026050475 - Integer overflow in Wasmtime

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Main Vulnerability Database SB2026050475

SB2026050475 - Integer overflow in Wasmtime

Published: May 4, 2026

Security Bulletin ID SB2026050475
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer overflow (CVE-ID: N/A)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to checked arithmetic that panics on overflow in WebAssembly table allocation logic when instantiating a WebAssembly module or component with an extremely large table. A remote user can supply a crafted WebAssembly module or component that allocates an extremely large table to cause a denial of service.

The issue affects the on-demand instance allocator and requires the memory64 WebAssembly feature to be enabled.


Remediation

Install update from vendor's website.

References