CVE-2026-112007
Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | schismtracker |
| Product | schism tracker |
| Published | Oct 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
schismtracker / Schism Tracker
0 ≤ 20260524
References
hackmd.io: https://hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-write github.com: https://github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330 github.com: https://github.com/schismtracker/schismtracker vulncheck.com: https://www.vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loader
Credits
HaiND from the Post and Telecommunication Institute of Technology