CVE-2026-54522: MessagePack::Buffer#clear Use-After-Free that Enables Cross-Buffer Disclosure
Overview
- Severity
- Medium (CVSS 5.4)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Aug
- Released
- 2026-08-07
- EPSS Score
- 0.14% (percentile: 3.5%)
Affected Products (1)
Open Source Software
- azl3 rubygem-msgpack 1.7.2-1 on Azure Linux 3.0
Revision History
- 2026-08-07: Information published.