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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64002
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:39 UTC
Updated2026-07-20 15:17:01 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001760000 probability, percentile 0.073850000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 ecf45080a4d3f4526cacb8b14060fe3b49a6913b git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 5b23a2ff379e70b6b9ff744a972b63e1f8f4d996 git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57 git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 6512c57c4638ddec113bf42439361ba85a12048d git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 a7f4eefb6e1458431eef9fa20fb363320d185f76 git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 155f90be5ee8be5b110ebc0b7da33c54c83b0208 git Not specified
CNA Linux Linux affected 122ff243f5f104194750ecbc76d5946dd1eec934 87a1e0fe7776da7ab411be332b4be58ac8840d10 git Not specified
CNA Linux Linux affected 3.16 Not specified
CNA Linux Linux unaffected 3.16 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/87a1e0fe7776da7ab411be332b4be58ac8840d10 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ecf45080a4d3f4526cacb8b14060fe3b49a6913b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a7f4eefb6e1458431eef9fa20fb363320d185f76 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5b23a2ff379e70b6b9ff744a972b63e1f8f4d996 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/155f90be5ee8be5b110ebc0b7da33c54c83b0208 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6512c57c4638ddec113bf42439361ba85a12048d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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