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Ubuntu Security NoticesUSN-8654-1

USN-8654-1: Netty vulnerabilities

It was discovered that Netty did not properly handle malformed HTTP/2 control frames. An attacker could use this to cause a denial of service via resource exhaustion. This issue only affects Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2025-55163) It was discovered that Netty did not properly validate the request URI for line-break characters. An attacker could use this to perform CRLF injection and request smuggling. (CVE-2025-67735)

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Scope

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Vulnerabilities

CVEs named in this advisory

CVE-2025-55163View CVSS, KEV, EPSS, and threat contextCVE-2025-67735View CVSS, KEV, EPSS, and threat context
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