RHSA-2026:6572 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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

Security Fix(es):

• kernel: nouveau: fix instmem race condition around ptr stores (CVE-2024-26984)
• kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193)
• kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain() (CVE-2026-23231)
• kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238)

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.

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

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for Real Time 8 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64

Fixes

• BZ - 2278333 - CVE-2024-26984 kernel: nouveau: fix instmem race condition around ptr stores
• BZ - 2439887 - CVE-2026-23193 kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()
• BZ - 2444376 - CVE-2026-23231 kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain()
• BZ - 2444398 - CVE-2025-71238 kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation.

CVEs

• CVE-2024-26984
• CVE-2025-71238
• CVE-2026-23193
• CVE-2026-23231

References

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