Bug 2502363 (CVE-2026-64002) - CVE-2026-64002 kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()
Summary: CVE-2026-64002 kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after...
Keywords:
Status: NEW
Alias: CVE-2026-64002
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:04 UTC by OSIDB Bzimport
Modified: 2026-09-08 07:19 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:61310 0 None None None 2026-08-31 06:38:31 UTC
Red Hat Product Errata RHSA-2026:61932 0 None None None 2026-09-01 09:29:03 UTC
Red Hat Product Errata RHSA-2026:61959 0 None None None 2026-09-01 11:09:29 UTC
Red Hat Product Errata RHSA-2026:62346 0 None None None 2026-09-02 01:12:45 UTC
Red Hat Product Errata RHSA-2026:62508 0 None None None 2026-09-02 08:31:39 UTC
Red Hat Product Errata RHSA-2026:62522 0 None None None 2026-09-02 08:14:16 UTC
Red Hat Product Errata RHSA-2026:62568 0 None None None 2026-09-02 11:02:46 UTC
Red Hat Product Errata RHSA-2026:62609 0 None None None 2026-09-02 12:29:38 UTC
Red Hat Product Errata RHSA-2026:63129 0 None None None 2026-09-04 00:53:01 UTC
Red Hat Product Errata RHSA-2026:64775 0 None None None 2026-09-08 07:19:55 UTC

Description OSIDB Bzimport 2026-07-19 16:04:04 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()

ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports
too soon.

Only after unregister_net_sysctl_table() we can be sure no threads can possibly
use the sysctls, including /proc/sys/net/ipv4/ip_local_reserved_ports.
Comment 1 Keith Grant 2026-07-22 00:00:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071907-CVE-2026-64002-b8fe@gregkh/T
Comment 3 errata-xmlrpc 2026-08-31 06:38:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:61310 https://access.redhat.com/errata/RHSA-2026:61310
Comment 4 errata-xmlrpc 2026-09-01 09:29:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:61932 https://access.redhat.com/errata/RHSA-2026:61932
Comment 5 errata-xmlrpc 2026-09-01 11:09:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:61959 https://access.redhat.com/errata/RHSA-2026:61959
Comment 6 errata-xmlrpc 2026-09-02 01:12:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:62346 https://access.redhat.com/errata/RHSA-2026:62346
Comment 7 errata-xmlrpc 2026-09-02 08:14:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:62522 https://access.redhat.com/errata/RHSA-2026:62522
Comment 8 errata-xmlrpc 2026-09-02 08:31:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:62508 https://access.redhat.com/errata/RHSA-2026:62508
Comment 9 errata-xmlrpc 2026-09-02 11:02:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:62568 https://access.redhat.com/errata/RHSA-2026:62568
Comment 10 errata-xmlrpc 2026-09-02 12:29:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:62609 https://access.redhat.com/errata/RHSA-2026:62609
Comment 11 errata-xmlrpc 2026-09-04 00:53:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:63129 https://access.redhat.com/errata/RHSA-2026:63129
Comment 13 errata-xmlrpc 2026-09-08 07:19:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:64775 https://access.redhat.com/errata/RHSA-2026:64775
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