{"id":"CVE-2026-112007","summary":"Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader","details":"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 overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.","modified":"2026-10-20T02:30:22.987298119Z","published":"2026-10-18T11:38:30.590Z","database_specific":{"cwe_ids":["CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112007.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112007.json"},{"type":"PACKAGE","url":"https://github.com/schismtracker/schismtracker"},{"type":"ARTICLE","url":"https://github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330"},{"type":"EVIDENCE","url":"https://hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-write"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112007"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loader"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/schismtracker/schismtracker","events":[{"introduced":"0"},{"last_affected":"74215ae300b555928332e03152dfcdc898f96ca6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"20260524"}],"source":"AFFECTED_FIELD"}}],"versions":["20260524","20251014","20250825","20250728","20250415","20250313","20250307","20250305","20250208","20250202","20241226","20241225","20241021","20240809","20240630","20240614","20240609","20240529","20240523","20240515","20240503","20240426","20240409","20240328","20240129","20231029","20230906","20221020","20221201","20220905","20220807","sdl1","20220506","20220125","20211116","20211115","deploy-test-6","deploy-test-5","20200412","20190805","20190722","20190614","issue-175.1","issue-175.0","20181223","macosx-deploy-test","20180810","20180513","20180209","deploy-test-4","20170910","deploy-test-3","deploy-test-2","deploy-test-1","20170420","20160913","20160521","hg-import"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112007.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"}]}