What is RHSA-2026:20597?

RHSA-2026:20597 is a security advisory published by Red Hat Product Security with Medium severity. Red Hat Security Advisory: glibc security update

Which CVE IDs does RHSA-2026:20597 cover?

RHSA-2026:20597 covers the following CVE IDs: CVE-2026-4046, CVE-2026-4437, CVE-2026-4438. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:20597?

RHSA-2026:20597 has a CVSS v3 base score of 6.5, published by Red Hat Product Security.

RHSA-2026:20597MediumCVSS 6.5

Red Hat Security Advisory: glibc security update

Vendor

Red Hat Product Security

Published

May 26, 2026

Last Modified

May 27, 2026

🔗 CVE IDs covered (3)

CVE-2026-4046 →CVE-2026-4437 →CVE-2026-4438 →

📋 Description

CVE-2026-4046 — glibc: glibc: Denial of Service via iconv() function with specific character sets CVE-2026-4437 — glibc: glibc: Incorrect DNS response parsing via crafted DNS server response CVE-2026-4438 — glibc: glibc: Invalid DNS hostname returned via gethostbyaddr functions

🔗 References (7)

selfhttps://access.redhat.com/errata/RHSA-2026:20597
externalhttps://access.redhat.com/security/updates/classification/#moderate
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2449777
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2449783
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2453117
externalhttps://issues.redhat.com/browse/RHEL-148252
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_20597.json