{"id":"CVE-2026-112007","title":"Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader","summary":"Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrite…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"schismtracker","product":"Schism Tracker","affected":["schism_tracker <= 20260524"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T11:38:30.590Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112007","references":[{"url":"https://hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-write"},{"url":"https://github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330"},{"url":"https://github.com/schismtracker/schismtracker"},{"url":"https://www.vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loader","label":"VulnCheck Advisory: Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T11:40:26.623Z","slug":"CVE-2026-112007","body":"## Overview\n\nSchism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.\n\n## Affected\n\n- `schism_tracker <= 20260524`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}