RHSA-2026:59663 — Security Advisory

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

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Severity

Important

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · August 26, 2026

Updated · November 3, 2026

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

kernel: net: atm: fix crash due to unvalidated vcc pointer in sigd_send() (CVE-2026-31411)
kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CVE-2026-43112)
kernel: net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels (CVE-2026-46099)
kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)

Bug Fix(es) and Enhancement(s):

[RHEL 9] Bonding reports unknown speed/duplex for tg3 interface (JIRA:RHEL-182765)
vhost: reset the vring metadata cache on vring reconfiguration (JIRA:RHEL-224546)

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.