What’s Vulnerable › Vulnerabilities

CVE-2024-24790: Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-05 · updated 2026-06-17

Description

The various Is methods (IsPrivate, IsLoopback, etc) did not work as expected for IPv4-mapped IPv6 addresses, returning false for addresses which would return true in their traditional IPv4 forms.

Affected products

• Go: before 1.21.11; from 1.22.0 before 1.22.4 — fixed in 1.21.11, 1.22.4

How to fix

Upgrade to a fixed version: Go 1.21.11, 1.22.4. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2024/06/04/1
• https://go.dev/cl/590316
• https://go.dev/issue/67680
• https://groups.google.com/g/golang-announce/c/XbxouI9gY7k/m/TuoGEhxIEwAJ
• https://pkg.go.dev/vuln/GO-2024-2887
• http://www.openwall.com/lists/oss-security/2024/06/04/1
• https://go.dev/cl/590316
• https://go.dev/issue/67680
• https://groups.google.com/g/golang-announce/c/XbxouI9gY7k/m/TuoGEhxIEwAJ
• https://pkg.go.dev/vuln/GO-2024-2887
• https://security.netapp.com/advisory/ntap-20240905-0002/

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