What is RHSA-2026:42096?

RHSA-2026:42096 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: c-ares security update

Which CVE IDs does RHSA-2026:42096 cover?

RHSA-2026:42096 covers the following CVE IDs: CVE-2026-33630. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:42096?

RHSA-2026:42096 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

Which products are affected by RHSA-2026:42096?

RHSA-2026:42096 affects 27 products, including: Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux BaseOS (v. 10); c-ares-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); c-ares-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); c-ares-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); and others — see the full list on the advisory page.

RHSA-2026:42096HighCVSS 7.5

Red Hat Security Advisory: c-ares security update

Vendor

Red Hat Product Security

Published

July 20, 2026

Last Modified

September 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-33630 →

📋 Description

CVE-2026-33630 — c-ares: c-ares: Use-after-free / double-free in query-completion handling

🎯 Affected products27

Red Hat Enterprise Linux AppStream (v. 10)
Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-0:1.34.6-2.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-0:1.34.6-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debuginfo-0:1.34.6-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-debugsource-0:1.34.6-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
c-ares-devel-0:1.34.6-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-devel-0:1.34.6-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-devel-0:1.34.6-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
c-ares-devel-0:1.34.6-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: There is no complete mitigation for the remotely-triggered path. As a partial mitigation, use trusted DNS resolvers reached over a trusted transport (e.g., DNS-over-TLS). Avoid calling ares_cancel() from within a query callback to prevent the application-triggered path. Upgrade to c-ares 1.34.7 or later.

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products27

✅ Remediation

🔗 References (4)