RHSA-2026:74174 — 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 1, 2026

Updated · November 1, 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: linux/dim: Fix divide by 0 in RDMA DIM (CVE-2022-49670)
kernel: wifi: mt76: mt7925: fix off by one in mt7925_load_clc() (CVE-2024-57990)
kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)
kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)
kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)
kernel: net: pull headers in qdisc_pkt_len_segs_init() (CVE-2026-53091)
kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002)
kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)
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: s390/pkey: Check length in pkey_pckmo handler implementation (CVE-2026-64558)
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: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098)
kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746)

Bug Fix(es) and Enhancement(s):

Intel CWF: CPU is unable to obtain cstate1 on idle system [rhel-9.6.z] (JIRA:RHEL-223903)
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) (JIRA:RHEL-250639)
DPLL: Add support for pin operational state [rhel-9.6.z] (JIRA:RHEL-262441)
try_charge_memcg() refactor in kernel 5.14.0-687.36.1 causes premature memcg OOM with GiB of clean page cache present [rhel-9.6.z] (JIRA:RHEL-269059)

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.