Packages
- unbound - validating, recursive, caching DNS resolver
Details
USN-7855-1 fixed vulnerabilities in Unbound. It was discovered that the fix
for CVE-2025-11411 was incomplete. This update fixes the problem.
Original advisory details:
Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that
Unbound incorrectly handled certain promiscuous NS RRSets. A remote
attacker could possibly use this issue to perform a domain hijack attack.
USN-7855-1 fixed vulnerabilities in Unbound. It was discovered that the fix
for CVE-2025-11411 was incomplete. This update fixes the problem.
Original advisory details:
Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that
Unbound incorrectly handled certain promiscuous NS RRSets. A remote
attacker could possibly use this issue to perform a domain hijack attack.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.10 questing | libunbound8 – 1.22.0-2ubuntu2.2 | ||
| unbound – 1.22.0-2ubuntu2.2 | |||
| 25.04 plucky | libunbound8 – 1.22.0-1ubuntu1.3 | ||
| unbound – 1.22.0-1ubuntu1.3 | |||
| 24.04 LTS noble | libunbound8 – 1.19.2-1ubuntu3.7 | ||
| unbound – 1.19.2-1ubuntu3.7 | |||
| 22.04 LTS jammy | libunbound8 – 1.13.1-1ubuntu5.14 | ||
| unbound – 1.13.1-1ubuntu5.14 | |||
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.