CVEvulnerability

CVE-2026-88351

9.8 CRITICAL Published 2026-09-24 Modified 2026-09-25 Official page ↗
Status
Deferred
Published
2026-09-24
Last modified
2026-09-25
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-190

Description

An integer overflow vulnerability exists in the MPack Node API in MPack 1.1.1 on 32-bit platforms. When parsing a specially crafted MessagePack array32 or map32 object with an excessively large element count, the page allocation size calculation in mpack_tree_parse_children() can overflow size_t and produce an undersized allocation. Subsequent parsing writes mpack_node_data_t records beyond the allocated heap buffer, resulting in heap-buffer-overflow, memory corruption, and denial of service.

Related

Weakness · CWE (1)

  • CWE-190 Integer Overflow or Wraparound weakness

References