RHSA-2026:94508 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Critical. 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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: xfrm: Duplicate SPI Handling (CVE-2025-39797)
• kernel: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (CVE-2025-71066)
• kernel: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close (CVE-2026-63974)
• kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path (CVE-2026-64534)
• kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer (CVE-2026-74556)
• kernel: nvme-tcp: fix host memory disclosure on R2T for a read command (CVE-2026-89481)
• kernel: ipv4: free inet_opt and ireq_opt after an RCU grace period (CVE-2026-98432)
• kernel: ZDI-CAN-33367: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability ()

Bug Fix(es) and Enhancement(s):

• CNB103: net: page_pool: avoid false positive warning if NAPI was never added [rhel-10.0.z] (JIRA:RHEL-162138)

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.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64

Fixes

• BZ - 2400057 - CVE-2025-39797 kernel: xfrm: Duplicate SPI Handling
• BZ - 2429036 - CVE-2025-71066 kernel: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change
• BZ - 2502462 - CVE-2026-63974 kernel: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close
• BZ - 2507399 - CVE-2026-64534 kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path
• BZ - 2517010 - CVE-2026-74556 kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer
• BZ - 2532184 - CVE-2026-89481 kernel: nvme-tcp: fix host memory disclosure on R2T for a read command
• BZ - 2553390 - CVE-2026-98432 kernel: ipv4: free inet_opt and ireq_opt after an RCU grace period
• BZ - 2559835 - kernel: ZDI-CAN-33367: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability

CVEs

• CVE-2025-39797
• CVE-2025-71066
• CVE-2026-63974
• CVE-2026-64534
• CVE-2026-74556
• CVE-2026-89481
• CVE-2026-98432

References

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