RHSA-2026:77689 — Security Advisory

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

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Severity

Important

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · October 9, 2026

Updated · November 3, 2026

Topic

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.

Description

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

Security Fix(es):

kernel: ipvlan: Make the addrs_lock be per port (CVE-2026-23103)
kernel: KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use (CVE-2026-53360)
kernel: vsock/virtio: fix zerocopy completion for multi-skb sends (CVE-2026-53365)
kernel: NFSD: Fix SECINFO_NO_NAME decode error cleanup (CVE-2026-53398)
kernel: vsock/virtio: bind uarg before filling zerocopy skb (CVE-2026-63970)
kernel: igc: set tx buffer type for SMD frames (CVE-2026-64035)
kernel: idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init() (CVE-2026-64162)
kernel: vsock/vmci: fix UAF when peer resets connection during handshake (CVE-2026-64115)
kernel: SUNRPC: pin upper rpc_clnt across the TLS connect_worker (CVE-2026-72317)
kernel: ipvlan: inherit needed_headroom and needed_tailroom from phy_dev (CVE-2026-74744)
kernel: nfsd: defer vfree of compound ops to fix rpc_status UAF (CVE-2026-89690)
kernel: nfsd: initialize copy-notify stateid before publishing it (CVE-2026-89669)
kernel: svcrdma: Reject inline replies that overflow the pull-up buffer (CVE-2026-89530)
kernel: nfsd: revoke copy-notify stateids before dropping their reference (CVE-2026-89663)

Bug Fix(es) and Enhancement(s):

"iavf: refactor iavf_clean_rx_irq to support legacy and flex descriptors" broke rx-vlan-offload on rhel-9.7 [rhel-9.8.z] (JIRA:RHEL-169480)
[GNR-D] missing interfaces tspll_cfg (JIRA:RHEL-183201)
RHEL9.8z KVM guest panicked in vmmouse driver (JIRA:RHEL-186577)
Add Epson RX8111 support to RHEL9.9 [rhel-9.8.z] (JIRA:RHEL-212014)
RT scheduler livelock: migrate-disabled task at pushable-list head causes repeated RT push/stopper retries, starving a critical RT task (remaining issue after CVE-2026-45919 fix in 94894c9c477e) [rhel-9.8.z] (JIRA:RHEL-256279)

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.