RHSA-2026:27076 - 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):

• python-pillow: Pillow: Denial of Service via decompression bomb in FITS image processing (CVE-2026-40192)
• yggdrasil-worker-forwarder: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)
• dynflow-utils: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)
• satellite:el8/yggdrasil-worker-forwarder: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation (CVE-2026-33186)
• yggdrasil-worker-forwarder: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation (CVE-2026-33186)
• yggdrasil-worker-forwarder: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679)
• satellite:el8/yggdrasil-worker-forwarder: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679)
• satellite:el8/yggdrasil-worker-forwarder: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729)
• satellite:el8/yggdrasil-worker-forwarder: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)
• yggdrasil-worker-forwarder: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)
• yggdrasil-worker-forwarder: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)
• satellite:el8/yggdrasil-worker-forwarder: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)
• satellite:el8/yggdrasil-worker-forwarder: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)
• yggdrasil-worker-forwarder: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)

Bug Fix(es):

• orphan cleanup triggers CapsuleContent::UpdateContentCounts regardless of automatic_content_count_updates setting (SAT-45906)
• The custom repository fails to sync with the Capsule server, resulting in an error (SAT-44720)

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 - 2418462 - CVE-2025-61729 crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate
• BZ - 2445356 - CVE-2026-25679 net/url: Incorrect parsing of IPv6 host literals in net/url
• BZ - 2449833 - CVE-2026-33186 google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation
• BZ - 2456333 - CVE-2026-32281 crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation
• BZ - 2456336 - CVE-2026-32282 golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root
• BZ - 2456338 - CVE-2026-32283 crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages
• BZ - 2456339 - CVE-2026-32280 crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building
• BZ - 2458856 - CVE-2026-40192 Pillow: Pillow: Denial of Service via decompression bomb in FITS image processing
• SAT-44720 - The custom repository fails to sync with the Capsule server, resulting in an error. [satellite_6.16]
• SAT-45906 - orphan cleanup triggers CapsuleContent::UpdateContentCounts regardless of automatic_content_count_updates setting [satellite_6.16]

CVEs

• CVE-2025-61729
• CVE-2026-25679
• CVE-2026-32280
• CVE-2026-32281
• CVE-2026-32282
• CVE-2026-32283
• CVE-2026-33186
• CVE-2026-40192

References

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