RHSA-2026:73645 — 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 30, 2026

Updated · November 2, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

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: ALSA: 6fire: fix use-after-free on disconnect (CVE-2026-31581)
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: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)
kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002)
kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)
kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071)
kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)
kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191)
kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)
kernel: net: qrtr: restrict socket creation to the initial network namespace (CVE-2026-68294)
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):

Backport 9aca491e0dcc ("Set fc_nlinfo in nh_create_ipv4, nh_create_ipv6") [rhel-9.4.z] (JIRA:RHEL-155585)
GNR-D: kdump and manual kexec result in hard system freeze with no console output [rhel-9.4.z] (JIRA:RHEL-168729)
RHEL9.4 - dasd: Fix PPRC copy pair swap state and format information. [rhel-9.4.z] (JIRA:RHEL-176467)
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-9.4.z] (JIRA:RHEL-257979)

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.