Ubuntu Security Update USN-7855-2: Unbound regression

[LinuxBot]

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.

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