Answer in brief
CVE-2026-64002 records a High severity (CVSS 7.8) vulnerability in ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=122ff243f5f104194750ecbc76d5946dd1eec934 <ecf45080a4d3f4526cacb8b14060fe3b49a6913b || >=122ff243f5f104194750ecbc76d5946dd1eec934 <a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c || >=122ff243f5f104194750ecbc76d5946dd1eec934 <5b23a2ff379e70b6b9ff744a972b63e1f8f4d996 || >=122ff243f5f104194750ecbc76d5946dd1eec934 <8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57 || >=122ff243f5f104194750ecbc76d5946dd1eec934 <6512c57c4638ddec113bf42439361ba85a12048d || >=122ff243f5f104194750ecbc76d5946dd1eec934 <a7f4eefb6e1458431eef9fa20fb363320d185f76 || >=122ff243f5f104194750ecbc76d5946dd1eec934 <155f90be5ee8be5b110ebc0b7da33c54c83b0208 || >=122ff243f5f104194750ecbc76d5946dd1eec934 <87a1e0fe7776da7ab411be332b4be58ac8840d10 | ecf45080a4d3f4526cacb8b14060fe3b49a6913b, a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c, 5b23a2ff379e70b6b9ff744a972b63e1f8f4d996, 8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57, 6512c57c4638ddec113bf42439361ba85a12048d, a7f4eefb6e1458431eef9fa20fb363320d185f76, 155f90be5ee8be5b110ebc0b7da33c54c83b0208, 87a1e0fe7776da7ab411be332b4be58ac8840d10 |
| Linux/Linuxgeneric | 3.16 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.