CVE-2026-80225
Publication date 16 September 2026
Last updated 21 October 2026
Ubuntu priority
Description
In NLnetLabs Unbound up to and including 1.26.0, a degradation of service vulnerability is present in the TCP/DoT reading procedure where there is no limit on consecutive reads. A malicious actor that can stream and sustain a rate of distinct uncached names over the TCP/DoT connection, monopolizes a single worker's entire event loop for as long as its writes stay ahead of the drain.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| unbound | 26.10 stonking |
Needs evaluation
|
| 26.04 LTS resolute |
Fixed in 1.24.2-1ubuntu2.4
|
|
| 24.04 LTS noble |
Fixed in 1.19.2-1ubuntu3.12
|
|
| 22.04 LTS jammy |
Fixed in 1.13.1-1ubuntu5.17
|
|
| 20.04 LTS focal |
Fixed in 1.9.4-2ubuntu1.11+esm3
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
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CVSS version: CVSS v3.0
Base score
5.3 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8946-1
- Unbound vulnerabilities
- 21 October 2026