High 7.8Published Jul 19, 2026

CVE-2026-64002ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()

Updated under an hour ago (Oct 26, 2026, 6:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 122ff243f5f104194750ecbc76d5946dd1eec934 before ecf45080a4d3f4526cacb8b14060fe3b49a6913b; from 122ff243f5f104194750ecbc76d5946dd1eec934 before a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c; 122ff243f5f104194750ecbc76d5946dd1eec934 builds before 5b23a2ff379e70b6b9ff744a972b63e1f8f4d996; 122ff243f5f104194750ecbc76d5946dd1eec934 builds before 8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57; from 122ff243f5f104194750ecbc76d5946dd1eec934 before 6512c57c4638ddec113bf42439361ba85a12048d; from 122ff243f5f104194750ecbc76d5946dd1eec934 before a7f4eefb6e1458431eef9fa20fb363320d185f76; from 122ff243f5f104194750ecbc76d5946dd1eec934 before 155f90be5ee8be5b110ebc0b7da33c54c83b0208; 122ff243f5f104194750ecbc76d5946dd1eec934 builds before 87a1e0fe7776da7ab411be332b4be58ac8840d10	CNA record
linux linux_kernel linux:linux_kernel	from 3.16 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35; from 6.19 before 7.0.12; 7.1; and 4 more ranges	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.