RLSA-2026:6036

Security

Mirrored from RHSA-2026:6036

Issued at: 2026-04-07

Updated at: 2026-04-07

Synopsis

Moderate: kernel-rt security update

Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem (CVE-2025-38180)

* kernel: macvlan: fix error recovery in macvlan_common_newlink() (CVE-2026-23209)

* kernel: net/sched: cls_u32: use skb_header_pointer_careful() (CVE-2026-23204)

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.

Affected products

Rocky Linux 8 x86_64

Fixes

2376376

2439900

2439931

CVEs

CVE-2025-38180

CVE-2026-23204

CVE-2026-23209

Affected packages

Rocky Linux 8 x86_64 - NFV

kernel-rt-0:4.18.0-553.115.1.rt7.456.el8_10.src.rpm

kernel-rt-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-core-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-core-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-debuginfo-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-devel-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debuginfo-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debuginfo-common-x86_64-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-kvm-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-modules-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-debug-modules-extra-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-devel-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-kvm-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-modules-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

kernel-rt-modules-extra-0:4.18.0-553.115.1.rt7.456.el8_10.x86_64.rpm

Rocky Linux 8 x86_64 - RT