RHSA-2026:93412 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.

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.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: sctp: stream: fully roll back denied add-stream state (CVE-2026-52929)

• kernel: ipv6: sit: reload inner IPv6 header after GSO offloads (CVE-2026-53228)

• kernel: ipvs: clear the svc scheduler ptr early on edit (CVE-2026-53270)

• kernel: spi: fsl-lpspi: terminate the RX channel on TX prepare failure path (CVE-2026-64303)

• kernel: mptcp: pm: userspace: fix use-after-free in get_local_id (CVE-2026-68169)

• kernel: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE (CVE-2026-72083)

• kernel: tipc: require net admin for TIPCv2 netlink mutators (CVE-2026-74283)

• kernel: Bluetooth: mgmt: fix UAF in pair command cancellation (CVE-2026-74510)

• kernel: packet: use consistent hard_header_len in non-ring send paths (CVE-2026-74582)

• kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586)

• kernel: entry: Fix seccomp bypass after ptrace with TSYNC (CVE-2026-89603)

• kernel: scsi: target: iscsi: Reserve a terminator byte for the login payload (CVE-2026-90011)

• kernel: virtio-fs: avoid double-free on failed queue setup (CVE-2026-93827)

• kernel: smb: client: bound dirent name against end of SMB response in cifs_filldir (CVE-2026-93787)

• kernel: xfrm: hold net_device reference under RCU in bundle creation (CVE-2026-98364)

• kernel: ipv4: free inet_opt and ireq_opt after an RCU grace period (CVE-2026-98432)

• kernel: KVM: arm64: Transfer the hyp stack pages out of the host stage-2 (CVE-2026-98466)

• kernel: nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge() (CVE-2026-98725)

• kernel: ZDI-CAN-33367: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability ()

Bug Fix(es) and Enhancement(s):

• kernel panic in percpu_counter_add_batch() via submit_bio_noacct() due to NULL pointer (JIRA:RHEL-250378)

• ipv4: ip_gre: make ipgre_header() robust (rhel-9.8.z) (JIRA:RHEL-271127)

• ip6_gre: make ip6gre_header() robust (rhel-9.8.z) (JIRA:RHEL-271130)

• Backport "sched: The newidle balance regression" series to rhel 9.8 [rhel-9.8.z] (JIRA:RHEL-288067)

• RHEL is missing support for conntrack zone filtering in dump/delete requests (9.10) [rhel-9.8.z] (JIRA:RHEL-291352)

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.