CVE-2026-12245
Publication date 25 June 2026
Last updated 26 June 2026
Ubuntu priority
Description
NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| nsd | 26.04 LTS resolute |
Fixed 4.14.0-1ubuntu0.1~esm1
|
| 25.10 questing |
Needs evaluation
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
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CVSS version: CVSS v4.0
Base score
8.7 · High
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8474-1
- NSD vulnerabilities
- 25 June 2026