Medium
schism — security advisory
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.
- Products
- schism
- Affected versions
- 2:20221201-1, 2:20230906-1, 2:20231029-1, 2:20240129-1, 2:20240308-1, 2:20240328-1, 2:20240409-1, 2:20240426-1, 2:20240503-1, 2:20240529-1, 2:20240614-1, 2:20240630-1, 2:20240809-1, 2:20240909-1, 2:20241021-1, 2:20241226-1, 2:20250208-1, 2:20250307-1, 2:20250313-1, 2:20250313-2, 2:20250825-1, 2:20251014-1, 2:20260524-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-112007
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 02:05 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2026-112007
schism
Fixed versions: Not specified
schism
Fixed versions: Not specified
Complete source record
{
"id": "a6436834c4a84fcc8e069810692184c2c8b61dafd53d449ac1ad0becdf035792",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-112007",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-112007",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-112007",
"products": [
{
"name": {
"value": "schism",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:20221201-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20230906-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20231029-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240129-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240308-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240328-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240409-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240426-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240503-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240529-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240614-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240630-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240809-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20240909-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20241021-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20241226-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20250208-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20250307-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20250313-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20250313-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:20250825-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20251014-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:20260524-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "schism",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:20250313-2",
"evidence": "/affected/1/versions"
},
{
"value": "2:20250825-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:20251014-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:20260524-1",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-112007",
"aliases": [
"DEBIAN-CVE-2026-112007"
],
"metrics": [
{
"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "schism",
"purl": "pkg:deb/debian/schism?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2:20221201-1",
"2:20230906-1",
"2:20231029-1",
"2:20240129-1",
"2:20240308-1",
"2:20240328-1",
"2:20240409-1",
"2:20240426-1",
"2:20240503-1",
"2:20240529-1",
"2:20240614-1",
"2:20240630-1",
"2:20240809-1",
"2:20240909-1",
"2:20241021-1",
"2:20241226-1",
"2:20250208-1",
"2:20250307-1",
"2:20250313-1",
"2:20250313-2",
"2:20250825-1",
"2:20251014-1",
"2:20260524-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-112007.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "schism",
"purl": "pkg:deb/debian/schism?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2:20250313-2",
"2:20250825-1",
"2:20251014-1",
"2:20260524-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-112007.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:05:32.473866394Z",
"provider": "osv",
"upstream": [
"CVE-2026-112007"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-112007"
]
},
"related_cves": [
{
"value": "CVE-2026-112007",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 424486,
"published_at": "2026-10-18T12:17:13.097+00:00"
}