What is RHSA-2026:23231?

RHSA-2026:23231 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: unbound security update

Which CVE IDs does RHSA-2026:23231 cover?

RHSA-2026:23231 covers the following CVE IDs: CVE-2026-33278, CVE-2026-42944, CVE-2026-42959. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:23231?

RHSA-2026:23231 has a CVSS v3 base score of 8.1, published by Red Hat Product Security.

RHSA-2026:23231HighCVSS 8.1

Red Hat Security Advisory: unbound security update

Vendor

Red Hat Product Security

Published

June 4, 2026

Last Modified

June 4, 2026

🔗 CVE IDs covered (3)

CVE-2026-33278 →CVE-2026-42944 →CVE-2026-42959 →

📋 Description

CVE-2026-33278 — unbound: Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution CVE-2026-42944 — unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options CVE-2026-42959 — unbound: Unbound DNSSEC Validator Denial of Service via Incorrect Write Offset Counter in Chase-Reply Messages

🔗 References (6)

selfhttps://access.redhat.com/errata/RHSA-2026:23231
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2479774
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2479806
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2479808
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_23231.json