RHSA-2026:28385 - Security Advisory

Topic

A new release is now available for Red Hat Satellite 6.18 for 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):

• python3.12-pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image (CVE-2026-25990)
• candlepin: com.mchange/c3p0: c3p0: Arbitrary Code Execution via deserialization of crafted objects (CVE-2026-27830)
• dynflow-utils: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)

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/6.18/html/updating_red_hat_satellite/index

Affected Products

• Red Hat Satellite 6.18 x86_64
• Red Hat Satellite Capsule 6.18 x86_64
• Red Hat Enterprise Linux for x86_64 9 x86_64

Fixes

• BZ - 2439170 - CVE-2026-25990 pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image
• BZ - 2442908 - CVE-2026-27830 c3p0: c3p0: Arbitrary Code Execution via deserialization of crafted objects
• BZ - 2456336 - CVE-2026-32282 golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root
• SAT-45570 - Incorrect Capsule Sync Status in Satellite 6.18 [satellite_6.18]
• SAT-45571 - Condensed report never has any data for advisor_on_prem_remediations_count [satellite_6.18]
• SAT-45883 - After Red Hat Satellite 6.18 upgrade, 100+ python3.11 packages leftover from "satellite-6.17-for-rhel-9-x86_64-rpms" repository which has no update available in "satellite-6.18-for-rhel-9-x86_64-rpms" repository
• SAT-45836 - EOL banner has broken link to Red Hat Satellite Upgrade Helper [satellite_6.18]

CVEs

• CVE-2026-25990
• CVE-2026-27830
• CVE-2026-32282

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/documentation/en-us/red_hat_satellite/6.18/html/updating_red_hat_satellite/index