CVE-2026-64002 Details
Description
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.
A vulnerability in the Linux kernel's handling of netlink socket information can lead to an unintentional information leak. This issue arises because the kernel improperly manages the synchronization of netlink socket data, allowing sensitive information to be exposed to user-space applications. The vulnerability is present in the stable branch of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been patched. Instructions for upgrading the kernel can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/155f90be5ee8be5b110ebc0b7da33c54c83b0208 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5b23a2ff379e70b6b9ff744a972b63e1f8f4d996 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6512c57c4638ddec113bf42439361ba85a12048d | kernel.org | Patch |
| https://git.kernel.org/stable/c/87a1e0fe7776da7ab411be332b4be58ac8840d10 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c | kernel.org | Patch |
| https://git.kernel.org/stable/c/a7f4eefb6e1458431eef9fa20fb363320d185f76 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ecf45080a4d3f4526cacb8b14060fe3b49a6913b | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.16, < 5.10.259 >= 5.11, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.93 >= 6.13, < 6.18.35 >= 6.19, < 7.0.12 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 19, 2026 | CVE Modified | CISA-ADP |
| Oct 16, 2026 | CVE Modified | kernel.org |
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 8, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |