RHSA-2026:62609 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 10.0 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: fanotify: fix false positive on permission events (CVE-2026-46150)
• kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)
• kernel: af_unix: Set gc_in_progress to true in unix_gc() (CVE-2026-53361)
• kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002)
• kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480)
• kernel: packet: use consistent hard_header_len in non-ring send paths ()
• kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer (CVE-2026-74581)

Bug Fix(es) and Enhancement(s):

• [kABI] protect struct alt_instr [rhel-10.0] (JIRA:RHEL-122758)

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.

Solution

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

https://access.redhat.com/articles/11258

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.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.0 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.0 ppc64le
• Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.0 s390x
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.0 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64

Fixes

• BZ - 2482612 - CVE-2026-46150 kernel: fanotify: fix false positive on permission events
• BZ - 2482614 - CVE-2026-46120 kernel: ip6_gre: Use cached t->net in ip6erspan_changelink()
• BZ - 2497035 - CVE-2026-53361 kernel: af_unix: Set gc_in_progress to true in unix_gc()
• BZ - 2502363 - CVE-2026-64002 kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()
• BZ - 2517046 - CVE-2026-74480 kernel: net: bridge: stop fast-leave after deleting a port group
• BZ - 2519475 - kernel: packet: use consistent hard_header_len in non-ring send paths
• BZ - 2520980 - CVE-2026-74581 kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer

CVEs

• CVE-2026-46120
• CVE-2026-46150
• CVE-2026-53361
• CVE-2026-64002
• CVE-2026-74480
• CVE-2026-74581
• CVE-2026-74582

References

• https://access.redhat.com/security/updates/classification/#important