CVE-2026-6477: PostgreSQL libpq lo_* functions let server superuser overwrite client stack memory
Overview
- Severity
- High (CVSS 8.8)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-May
- Released
- 2026-05-16
- Last Updated
- 2026-05-19
- EPSS Score
- 0.28% (percentile: 20.1%)
Affected Products (2)
Open Source Software
- azl3 rust 1.75.0-28 on Azure Linux 3.0
- azl3 postgresql 16.12-1 on Azure Linux 3.0
Revision History
- 2026-05-16: Information published.
- 2026-05-17: Information published.
- 2026-05-19: Information published.