RHSA-2026:65708 — 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 · September 9, 2026

Updated · November 2, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.

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: rxrpc: Fix potential UAF after skb_unshare() failure (CVE-2026-45998)
kernel: smb/client: fix out-of-bounds read in smb2_compound_op() (CVE-2026-46155)
kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership() (CVE-2026-52933)
kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)
kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)
kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode (CVE-2026-63886)
kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191)
kernel: posix-cpu-timers: Prevent UAF caused by non-leader exec() race (CVE-2026-64560)

Bug Fix(es) and Enhancement(s):

[HPEMC RHEL 9 BUG] tick/sched: Limit non-timkeeper CPUs calling jiffies upda [rhel-9.6.z] (JIRA:RHEL-141460)
ibmveth Adapter Freeze with Small MSS [rhel-9.6.z] (JIRA:RHEL-178307)
RT scheduler livelock caused by missing backport of 94894c9c477e [rhel-9.6.z] (JIRA:RHEL-244409)

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.