CVE-2026-112007

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{"bugzilla": {"description": "schismtracker: Schism Tracker: Denial of Service via crafted ULT module file", "id": "2554766", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554766"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-787", "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.", "A flaw was found in Schism Tracker. An attacker could exploit this vulnerability by enticing a user to open a specially crafted UltraTracker (.ult) audio file. Due to missing boundary checks on sample counts during file parsing, the application performs an out-of-bounds memory write on the heap. This flaw can corrupt application memory and cause the program to crash, resulting in a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "avoid opening untrusted .ult modules until upstream adds the MAX_SAMPLES clamp mirroring fmt/okt.c and fmt/mtm.c"}, "name": "CVE-2026-112007", "public_date": "2026-10-18T11:38:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-112007\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-112007\nhttps://github.com/schismtracker/schismtracker\nhttps://github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330\nhttps://hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-write\nhttps://www.vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loader"], "statement": "heap OOB write in fmt_ult_load_song() via unclamped one-byte sample count; user must open crafted .ult; DoS within application process; no upstream fix as of 2026-10-21", "threat_severity": "Moderate"}

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