HighFix available
ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.259, 5.15.210, 6.1.176, 6.12.93, 6.18.35, 6.6.143, 7.0.12
- CVEs
- CVE-2026-64002
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 23:01 UTC · Revision 1
Source evidence
ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()
core-osv · Original sourcePublished 19 Jul 2026, 14:56 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.
osv:CVE-2026-64002
Kernel
Fixed versions: 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12
Complete source record
{
"id": "1b10846801ea3e645d52b21981e417faea79bbd49a379e70b8746df5775778cd",
"url": "https://osv.dev/vulnerability/CVE-2026-64002",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()",
"summary": "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.",
"evidence": "osv:CVE-2026-64002",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.259",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.210",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.176",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.143",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.93",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.35",
"evidence": "/affected/1/ranges"
},
{
"value": "7.0.12",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CVE-2026-64002",
"aliases": [
"CVE-2026-64002"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
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{
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64002.json"
}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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"introduced": "3.16.0"
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{
"type": "ECOSYSTEM",
"events": [
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"introduced": "5.11.0"
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{
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},
{
"type": "ECOSYSTEM",
"events": [
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{
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},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
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{
"fixed": "6.6.143"
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.93"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.35"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.0.12"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64002.json"
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],
"modified": "2026-10-28T02:30:32.079769529Z",
"provider": "osv",
"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",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64002.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-64002",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64002.json"
}
},
"related_cves": [
{
"value": "CVE-2026-64002",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499210,
"published_at": "2026-07-19T14:56:19.495+00:00"
}