RHSA-2026:18153 - Security Advisory

Topic

An update for systemd is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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

The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit.

Security Fix(es):

• systemd-coredump: race condition that allows a local attacker to crash a SUID program and gain read access to the resulting core dump (CVE-2025-4598)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x

Fixes

• BZ - 2369242 - CVE-2025-4598 systemd-coredump: race condition that allows a local attacker to crash a SUID program and gain read access to the resulting core dump
• RHEL-108006 - [follow-up to] - chase: introduce flags that verify that chased inode is regular file or dir
• RHEL-109552 - [Azure][CVM][RHEL-10] The output of 'ukify inspect' contains malformed binary contents
• RHEL-112203 - Backport systemd PR #38677: Fix dependency loop handling in core/unit
• RHEL-114414 - ukify: fix insertion of padding in merged sections
• RHEL-109902 - Unable to log in as "user@domain" or "domain\user" if systemd-userdbd is enabled
• RHEL-112205 - Backport systemd PR #38776: core/transaction: first drop unmergable jobs for anchor jobs
• RHEL-113051 - [RFE] add udev rule to set group of PTP clocks
• RHEL-128767 - Add signal section in man systemd-logind and mention SIGHUP
• RHEL-129179 - core: Make DelegateNamespaces= work for user managers with CAP_SYS_ADMIN
• RHEL-72813 - Update list of RHEL specific network naming schemes - RHEL 10.2
• RHEL-115001 - systemd CI fixes [rhel-10.2]
• RHEL-143029 - Backport support for userdbctl --from-file
• RHEL-72702 - Update HWDB to support new HW [RHEL-10.2]
• RHEL-143034 - Backport support for perMachine Negative Matches
• RHEL-143036 - Backport support for UUID Field
• RHEL-53112 - dbusmock breaks active logind sessions

CVEs

• CVE-2025-4598

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10/html/10.2_release_notes/index