CVE-2026-112007
Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader
schismtracker Schism Tracker
CVSS
6.9MediumExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 19 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.13%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 1
- Schism Trackeraffected: all versions through 20260524CVE List
References 4
- vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loaderAdvisoryvia CVE List
- hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-writeExploitvia CVE List
- github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330Referencevia CVE List
- github.com/schismtracker/schismtrackerReferencevia CVE List