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CVE-2026-64002

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

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Severity

Important

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 14, 2026

Description

A flaw was found in the Linux kernel's IPv4 networking component. The ipv4_sysctl_exit_net() function prematurely frees the net->ipv4.sysctl_local_reserved_ports memory. This can lead to a use-after-free vulnerability, where other threads might attempt to access deallocated memory. Such an issue can result in system instability or a denial of service.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-825 · Expired Pointer Dereference