What’s Vulnerable › Vulnerabilities

CVE-2025-11232: Invalid characters cause assert

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-29 · updated 2026-10-08
• Weakness: CWE-823

Description

To trigger the issue, three configuration parameters must have specific settings: "hostname-char-set" must be left at the default setting, which is "[^A-Za-z0-9.-]"; "hostname-char-replacement" must be empty (the default); and "ddns-qualifying-suffix" must *NOT* be empty (the default is empty). DDNS updates do not need to be enabled for this issue to manifest. A client that sends certain option content would then cause kea-dhcp4 to exit unexpectedly. This issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2.

Affected products

• ISC Kea: from 3.0.1 through 3.0.1; from 3.1.1 through 3.1.2

References

• https://kb.isc.org/docs/cve-2025-11232
• http://www.openwall.com/lists/oss-security/2025/10/29/5

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