CVE-2026-64002 (CVSS 7.8)

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.

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CVSS v3.1 Score

7.8

HIGH

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

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/155f90be5ee8be5b110ebc0b7da33c54c83b0208 https://git.kernel.org/stable/c/5b23a2ff379e70b6b9ff744a972b63e1f8f4d996 https://git.kernel.org/stable/c/6512c57c4638ddec113bf42439361ba85a12048d https://git.kernel.org/stable/c/87a1e0fe7776da7ab411be332b4be58ac8840d10 https://git.kernel.org/stable/c/8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57 https://git.kernel.org/stable/c/a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c https://git.kernel.org/stable/c/a7f4eefb6e1458431eef9fa20fb363320d185f76 https://git.kernel.org/stable/c/ecf45080a4d3f4526cacb8b14060fe3b49a6913b

Frequently Asked Questions

What is CVE-2026-64002? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-64002? +

CVE-2026-64002 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-64002? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-64002