7.8

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

Modified
AliasesRHSA-2026:61310RHSA-2026:61959UBUNTU-CVE-2026-64002
Published 19-07-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-64002 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 54 · Related 37
OPENSUSE-SU-2026:21910-1RHSA-2026:61932RHSA-2026:62346RHSA-2026:62508RHSA-2026:62522RHSA-2026:62568

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.13% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Redhat24 products
  • bpftool< 0:4.18.0-372.210.1.el8_6 | < 0:4.18.0-305.203.1.el8_4
  • bpftool-debuginfo< 0:4.18.0-372.210.1.el8_6 | < 0:4.18.0-305.203.1.el8_4
  • kernel< 0:4.18.0-372.210.1.el8_6 | < 0:4.18.0-305.203.1.el8_4
  • kernel-abi-stablelists< 0:4.18.0-372.210.1.el8_6 | < 0:4.18.0-305.203.1.el8_4
  • kernel-core< 0:4.18.0-372.210.1.el8_6 | < 0:4.18.0-305.203.1.el8_4
Linux2 products
  • linux≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < ecf45080a4d3f4526cacb8b14060fe3b49a6913b | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < 5b23a2ff379e70b6b9ff744a972b63e1f8f4d996 | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < 8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57 | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < 6512c57c4638ddec113bf42439361ba85a12048d | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < a7f4eefb6e1458431eef9fa20fb363320d185f76 | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < 155f90be5ee8be5b110ebc0b7da33c54c83b0208 | ≥ 122ff243f5f104194750ecbc76d5946dd1eec934, < 87a1e0fe7776da7ab411be332b4be58ac8840d10 | 3.16
  • linux_kernel≥ 3.16, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.93 | ≥ 6.13, < 6.18.35 | ≥ 6.19, < 7.0.12 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

4 vendors · 194 products

References

41 links
Show all 41 references