CVE-2026-112007: Out-of-bounds Write in schismtracker Schism Tracker
Description
Schism Tracker through version 0 contains a heap out-of-bounds write vulnerability in the function fmt_ult_load_song() due to improper clamping of a one-byte sample count. This allows crafted .ult modules to overwrite the instruments pointer array, leading to potential crashes when csf_destroy() frees attacker-controlled pointers. The vulnerability has a CVSS 4.0 score of 6.9, indicating medium severity.
CVSS v4.0
Score 6.9medium
Affected software
schismtracker
Schism Tracker
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-112007 describes a heap out-of-bounds write in Schism Tracker (up to version 0) within the fmt_ult_load_song() function in fmt/ult.c. The vulnerability arises because the one-byte sample count is not properly clamped to MAX_SAMPLES, enabling an attacker to supply a malicious .ult module that overwrites the instruments pointer array. This causes the csf_destroy() function to free pointers chosen by the attacker, resulting in application crashes.
Potential Impact
Successful exploitation can cause the application to crash due to freeing attacker-controlled pointers. There is no indication of privilege escalation or remote code execution. The attack requires user interaction (UI:P) and local access (AV:L).
Mitigation Recommendations
No patch or official fix information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid opening untrusted .ult modules to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-18T01:23:41.645Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad4b23a2cdf04f65664e4b3
Added to database: 10/18/2026, 11:49:14 UTC
Last enriched: 10/18/2026, 12:04:11 UTC
Last updated: 10/18/2026, 19:55:34 UTC
Views: 4
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