RHSA 2026:61310

access.redhat.com • September 2, 2026

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On.

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.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002)

For more details 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.

For details on how to apply this update, which includes the changes described in this advisory, refer to:

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.6 x86_64

Red Hat Enterprise Linux Server - AUS 8.6 x86_64

BZ - 2502363 - CVE-2026-64002 kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()

Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.6

Red Hat Enterprise Linux Server - AUS 8.6

The Red Hat security is [email protected] . More details at .

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Multiple Kernel Vulnerabilities Impacting Red Hat Systems Red Hat has released several kernel updates addressing multiple vulnerabilities rated as Important. These vulnerabilities affect various versions of Red Hat Enterprise Linux, including 8.4, 8.6, and 8.8. Key issues include a use-after-free vulnerability (CVE-2026-64002) and a fast-leave issue in the bridge networking component (CVE-2026-74480). The updates require system reboots to take effect, and administrators are advised to apply them promptly to mitigate potential security risks. The vulnerabilities could lead to arbitrary code execution, memory corruption, and other security issues. Red Hat emphasizes the importance of treating all kernel updates as security-relevant due to the kernel's critical role in system security. The advisories also highlight the need for proactive patch management to protect systems from exploitation. 5 sources 46

Extracted Entities

RHSA 2026:61310

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Extracted Entities

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