Advisory severityMedium5.9Red Hat Linux

Medium [CVE-2026-78227] Denial of Service via use-after-free in DoQ stream output buffer

This medium-severity Red Hat Linux advisory covers CVE-2026-78227; related products: Red Hat Hardened Images.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-78227 Source published Sep 16, 2026Source updated Sep 16, 2026

VulniPulse record published Sep 16, 2026Record updated Sep 23, 2026

CVE-2026-78227

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Denial of Service via use-after-free in DoQ stream output buffer. Red Hat rates this moderate (CVSS 5.9).

Weakness: CWE-416. Red Hat lists fixing advisory RHSA-2026:68590 with package unbound-main-1.26.1-1.hum1.

Affected product named by the advisory: Red Hat Hardened Images.

Affected versions

1.22.0
1.26.1

Official advisory · high-confidence parse· fetched 16 days ago·verify at source

Fixed versions

unbound-main-1.26.1-1.hum1
RHSA-2026:68590

Official advisory · high-confidence parse· fetched 16 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

To mitigate this do not set quic-port unless DNS-over-QUIC is required. If it is enabled, allow it only from trusted clients.

Official advisory · high-confidence parse· fetched 16 days ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.