RHSA-2026:77216 — Security Advisory

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

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · October 7, 2026

Updated · November 5, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On.

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: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events (CVE-2025-68347)
kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)
kernel: udf: fix partition descriptor append bookkeeping (CVE-2026-45991)
kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv (CVE-2026-46043)
kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing (CVE-2026-46133)
kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)
kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)
kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)
kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)
kernel: netfilter: synproxy: refresh tcphdr after skb_ensure_writable (CVE-2026-64007)
kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921)
kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919)
kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917)
kernel: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CVE-2026-64320)
kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)
kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap (CVE-2026-64582)
kernel: net: qrtr: restrict socket creation to the initial network namespace (CVE-2026-68294)
kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment (CVE-2026-68426)
kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer (CVE-2026-74556)
kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746)
kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp (CVE-2026-80864)
kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources() (CVE-2026-80863)

Bug Fix(es) and Enhancement(s):

NFS client hangs while returning delegations (JIRA:RHEL-112278)
scsi: mpt3sas: avoid freeing unallocated PCIe SGL buffers (JIRA:RHEL-256998)
xfs corruption from [xfs_trans_cancel] during inode allocation (JIRA:RHEL-257186)

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.