{"id":"CVE-2026-120458","title":"Kvazaar through 2.3.2 Infinite Loop DoS via Y4M Header Parser","summary":"Kvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-835"],"vendor":"Ultra Video Group","product":"Kvazaar","affected":["Kvazaar <= 2.3.2"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-07T00:19:27.404269Z"},"exploitAvailable":true,"published":"2026-11-02","updated":"2026-11-07","sourceUpdated":"2026-11-07T00:19:55.916Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120458","references":[{"url":"https://github.com/ultravideo/kvazaar/issues/452"},{"url":"https://github.com/ultravideo/kvazaar/commit/8a2f109be283e87008c679d635966cc034da39c6"},{"url":"https://github.com/ultravideo/kvazaar/blob/v2.3.2/src/encmain.c#L339-L357"},{"url":"https://github.com/ultravideo/kvazaar/releases/tag/v2.3.2","label":"Kvazaar v2.3.2 Release Notes"},{"url":"https://hackmd.io/@haindpwn/kvazaar-y4m-header-missing-newline-infinite-loop"},{"url":"https://www.vulncheck.com/advisories/kvazaar-through-2.3.2-infinite-loop-dos-via-y4m-header-parser","label":"VulnCheck Advisory: Kvazaar through 2.3.2 Infinite Loop DoS via Y4M Header Parser"}],"tags":["cve.org","exploit-available"],"epss":0.00165,"epssPercentile":0.05792,"ingestedAt":"2026-11-05T19:30:42.660Z","slug":"CVE-2026-120458","body":"## Overview\n\nKvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking a terminating newline, causing unchecked EOF reads that hang the process indefinitely while consuming a full CPU core.\n\n## Affected\n\n- `Kvazaar <= 2.3.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":235711,"id":"CVE-2026-120458","ts":1794013690650,"field":"exploit_available","old":"false","new":"true"}]}