RHSA-2026:68100 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 9.4 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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: fanotify: fix false positive on permission events (CVE-2026-46150)
• kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership() (CVE-2026-52933)
• kernel: netfilter: nat: use kfree_rcu to release ops (CVE-2026-53000)
• kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888)
• kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf (CVE-2026-63887)
• kernel: Kernel: Remote out-of-bounds write in RDMA/siw (CVE-2026-64268)
• kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() (CVE-2026-64438)

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 Server - AUS 9.4 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.4 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.4 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.4 s390x

Fixes

• BZ - 2482612 - CVE-2026-46150 kernel: fanotify: fix false positive on permission events
• BZ - 2492097 - CVE-2026-52933 kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership()
• BZ - 2492273 - CVE-2026-53000 kernel: netfilter: nat: use kfree_rcu to release ops
• BZ - 2502443 - CVE-2026-63888 kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()
• BZ - 2502447 - CVE-2026-63887 kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
• BZ - 2507089 - CVE-2026-64268 kernel: Kernel: Remote out-of-bounds write in RDMA/siw
• BZ - 2507118 - CVE-2026-64438 kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()

CVEs

• CVE-2026-46150
• CVE-2026-52933
• CVE-2026-53000
• CVE-2026-63887
• CVE-2026-63888
• CVE-2026-64268
• CVE-2026-64438

References

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