RHSA-2025:22387 - 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: nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm() (CVE-2025-38724)
• kernel: smb: client: fix race with concurrent opens in rename(2) (CVE-2025-39825)
• kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory (CVE-2025-39883)
• kernel: e1000e: fix heap overflow in e1000_set_eeprom (CVE-2025-39898)
• kernel: nbd: fix incomplete validation of ioctl arg (CVE-2023-53513)
• kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect() (CVE-2025-39955)

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

Fixes

• BZ - 2393172 - CVE-2025-38724 kernel: nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()
• BZ - 2395792 - CVE-2025-39825 kernel: smb: client: fix race with concurrent opens in rename(2)
• BZ - 2397553 - CVE-2025-39883 kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory
• BZ - 2400598 - CVE-2025-39898 kernel: e1000e: fix heap overflow in e1000_set_eeprom
• BZ - 2400795 - CVE-2023-53513 kernel: nbd: fix incomplete validation of ioctl arg
• BZ - 2402699 - CVE-2025-39955 kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect()

CVEs

• CVE-2023-53513
• CVE-2025-38724
• CVE-2025-39825
• CVE-2025-39883
• CVE-2025-39898
• CVE-2025-39955

References

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