SB2026042473 - NULL pointer dereference in wasm-micro-runtime

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Main Vulnerability Database SB2026042473

SB2026042473 - NULL pointer dereference in wasm-micro-runtime

Published: April 24, 2026

Security Bulletin ID SB2026042473
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local 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) NULL pointer dereference (CVE-ID: CVE-2025-58749)

CWE-ID: CWE-476 - NULL Pointer Dereference

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


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

The vulnerability exists due to invalid pointer access in LLVM-JIT mode in iwasm when executing a wasm program containing a memory.fill instruction with the first operand greater than or equal to 2 GiB. A local user can run a specially crafted wasm program to cause a denial of service.

The issue occurs in LLVM-JIT mode; release builds hang while debug builds crash.


Remediation

Install update from vendor's website.

References