RHSA-2025:23424 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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: scsi: qla2xxx: Wait for io return on terminate rport (CVE-2023-53322)
• kernel: wifi: cfg80211: fix use-after-free in cmp_bss() (CVE-2025-39864)
• 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)
• kernel: tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request() (CVE-2025-40186)

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 x86_64 - Update Services for SAP Solutions 9.0 x86_64

Fixes

• BZ - 2395891 - CVE-2023-53322 kernel: scsi: qla2xxx: Wait for io return on terminate rport
• BZ - 2396934 - CVE-2025-39864 kernel: wifi: cfg80211: fix use-after-free in cmp_bss()
• 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()
• BZ - 2414724 - CVE-2025-40186 kernel: tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request()

CVEs

• CVE-2023-53322
• CVE-2023-53513
• CVE-2025-39864
• CVE-2025-39955
• CVE-2025-40186

References

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