RHSA-2026:13578 - 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 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

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: nvme: avoid double free special payload (CVE-2024-41073)
• kernel: net: qlogic/qede: fix potential out-of-bounds read in qede_tpa_cont() and qede_tpa_end() (CVE-2025-40252)
• kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)
• kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402)
• kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401)
• kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431)

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 - 2301637 - CVE-2024-41073 kernel: nvme: avoid double free special payload
• BZ - 2424886 - CVE-2025-68724 kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id
• BZ - 2453803 - CVE-2026-23401 kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling
• BZ - 2454844 - CVE-2026-31402 kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache
• BZ - 2460538 - CVE-2026-31431 kernel: crypto: algif_aead - Revert to operating out-of-place

CVEs

• CVE-2024-41073
• CVE-2025-40252
• CVE-2025-68724
• CVE-2026-23401
• CVE-2026-31402
• CVE-2026-31431

References

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