{"id":"AZL-97566","summary":"CVE-2026-63385 affecting package ntp 4.2.8p17-2","details":"Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has two HTTP parsing weaknesses in http.c. evhttp_decode_uri_internal decodes percent-encoded %00 bytes into literal NUL characters, which can cause downstream C string operations to truncate a path and bypass validation performed on a different representation. evhttp_header_is_valid_value also accepts obsolete line folding in header values containing carriage return or line feed characters, allowing a proxy and libevent to interpret headers differently and enabling header injection or access control bypass. The CRLF header acceptance is fixed in versions 2.1.13 and 2.2.2-alpha, but the reviewed patches do not clearly remediate the URI NUL-truncation condition.","modified":"2026-08-29T05:27:27Z","published":"2026-08-20T18:16:36Z","upstream":["CVE-2026-63385"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63385"}],"affected":[{"package":{"name":"ntp","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/ntp"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.2.8p17-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-97566.json"}}],"schema_version":"1.9.0"}