CVE-2026-6477
CVE-2026-6477: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh8.4
High [CVE-2026-6477] PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory
CVE-2026-6477Source published
PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory. Red Hat rates this important (CVSS 8.4). Weakness: CWE-120. Affected package(s): postgresql, postgresql:12, postgresql:18, postgresql:15, libpq, postgresql16. Resolved in Red Hat advisory RHSA-2026:26561 — update the affected packages (`sudo dnf update`).
- Affected products in this advisory
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
10 more entries in the full advisory.
- Source-reported affected versions
- postgresql-0:13.23-1.el9_4.2
- postgresql:12-8080020260626093604.63b34585
- postgresql-0:13.23-1.el9_2.2
- postgresql:18-9080020260605125734.rhel9
8 more entries in the full advisory.
- Source-reported fixed versions
- RHSA-2026:26561
- Mitigation guidance
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26561 (`sudo dnf update` / `yum update`).
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