RHSA-2026:77301 — 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 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.

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: smc: Fix use-after-free in tcp_write_timer_handler() (CVE-2023-53781)
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: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)
kernel: Linux kernel: xfrm single-frag length not properly limited ()
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: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)
kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)
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: 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: 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):

scsi: mpt3sas: avoid freeing unallocated PCIe SGL buffers (JIRA:RHEL-256999)
xfs corruption from [xfs_trans_cancel] during inode allocation (JIRA:RHEL-257187)

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.