RHSA-2026:42082 - Security Advisory

Topic

An update is now available for Red Hat Satellite 6.16 for RHEL 8 and RHEL 9.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

Description

Red Hat Satellite is a system management solution that allows organizations
to configure and maintain their systems without the necessity to provide
public Internet access to their servers or other client systems. It
performs provisioning and configuration management of predefined standard
operating environments.

Security Fix(es):

• yggdrasil-worker-forwarder: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145)
• yggdrasil-worker-forwarder: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811)
• yggdrasil-worker-forwarder: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)
• python-pulpcore: pulpcore: relative_path_validator bypass via directory traversal in FilesystemExport (CVE-2026-12701)

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For detailed instructions how to apply this update, refer to:

https://docs.redhat.com/en/documentation/red_hat_satellite/6.16/html/updating_red_hat_satellite/index

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Satellite Extended Update Support 6.16 for RHEL 9 x86_64
• Red Hat Satellite Extended Update Support 6.16 for RHEL 8 x86_64
• Red Hat Satellite Capsule Extended Update Support 6.16 for RHEL 9 x86_64
• Red Hat Satellite Capsule Extended Update Support 6.16 for RHEL 8 x86_64

Fixes

• BZ - 2467822 - CVE-2026-33811 net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME
• BZ - 2480756 - CVE-2026-39821 golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing
• BZ - 2484207 - CVE-2026-27145 crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries
• BZ - 2490703 - CVE-2026-12701 pulpcore: pulpcore: relative_path_validator bypass via directory traversal in FilesystemExport

CVEs

• CVE-2026-12701
• CVE-2026-27145
• CVE-2026-33811
• CVE-2026-39821

References

• https://access.redhat.com/security/updates/classification/#important