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CVE-2026-64002

33
FAUCET Score

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.

First published: Jul 19, 2026Last modified: Jul 20, 2026

Impacted Technologies

VendorProductVersion(s)CPE
LinuxLinux
3.16CNA affecteddefault affected
LinuxLinux
>= 122ff243f5f104194750ecbc76d5946dd1eec934, < 155f90be5ee8be5b110ebc0b7da33c54c83b0208, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < 5b23a2ff379e70b6b9ff744a972b63e1f8f4d996, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < 6512c57c4638ddec113bf42439361ba85a12048d, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < 87a1e0fe7776da7ab411be332b4be58ac8840d10, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < 8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < a7f4eefb6e1458431eef9fa20fb363320d185f76, >= 122ff243f5f104194750ecbc76d5946dd1eec934, < ecf45080a4d3f4526cacb8b14060fe3b49a6913bCNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.13%
Probability of exploitation in next 30 days
EPSS Percentile
2.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0013 is in the 14th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

ubuntupatch availablevia ubuntu_usn
Product: linux-ibm (resolute)Fixed in: 7.0.0-1010.10
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle (resolute)Fixed in: 7.0.0-1008.8
ubuntupatch availablevia ubuntu_usn
Product: linux-azure (resolute)Fixed in: 7.0.0-1010.10
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-fde (resolute)Fixed in: 7.0.0-1009.9

Vendor Advisories (2)

ubuntuUSN-8603-1

Linux kernel (Azure) vulnerabilities

Jul 24, 2026
ubuntuUSN-8593-1

Linux kernel vulnerabilities

Jul 23, 2026

References

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