High severity · published Oct 29, 2025
CVE-2025-11232
Invalid characters cause assert
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kea · ISC
3.0.1 through 3.0.1; 3.1.1 through 3.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11232
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11232
kb.isc.org
https://kb.isc.org/docs/cve-2025-11232
www.openwall.com
http://www.openwall.com/lists/oss-security/2025/10/29/5
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