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Critical ldns Vulnerability in Ubuntu Allows Spoofed DNS Responses

ID: 7433721c-6770-5d93-9439-60f4c89a5f7f

STIX ID: report--7433721c-6770-5d93-9439-60f4c89a5f7f

Feed Name: ThreatCluster

Threat Score
70/100

Date Published: 2026-06-18

Date Updated: 2026-06-22

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A critical vulnerability in the ldns library used by Ubuntu's stub resolver over UDP can allow remote attackers to inject arbitrary DNS responses (spoofed DNS), impacting Ubuntu LTS releases 26.04, 24.04, 22.04, 20.04, 18.04, and 16.04; users are advised to apply the latest package updates (Ubuntu Pro users have extended security maintenance) to mitigate risks including phishing and man-in-the-middle attacks.

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