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CVE-2026-112007

Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader

6.9 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
High

Exploit likelihood

0.13%Unchanged since Oct 19, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader

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.

Record
CVE-2026-112007
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
EUVDEUVD-2026-103460 6.9

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.

Record
EUVD-2026-103460
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-qfh4-g83h-4vcx 6.9

Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in...

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.

Record
GHSA-qfh4-g83h-4vcx
CVSS 4.0
6.9 MediumCVSS: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
CVSS 3.1
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
NVD 6.9

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.

Record
CVE-2026-112007
CVSS 4.0
6.9 MediumCVSS: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
CVSS 3.1
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
OSV 6.9

Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader

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.

Record
CVE-2026-112007
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-787
Updated
2026-11-04
OSVDEBIAN-CVE-2026-112007 6.9

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.

Record
DEBIAN-CVE-2026-112007
CVSS 4.0
6.9 MediumCVSS: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
Updated
2026-11-02
OSVUBUNTU-CVE-2026-112007 6.9

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.

Record
UBUNTU-CVE-2026-112007
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2026:12410-1 No score

schismtracker-20261102-1.1 on GA media

These are all security issues fixed in the schismtracker-20261102-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12410-1
Updated
2026-11-04

Affected products

Affected packages

Affected packages
PackageAffectedFixed
schism
Debian:12
 All versions, plus listed versions
2:20221201-12:20230906-12:20231029-12:20240129-12:20240308-1
Show 18 moreShow less
2:20240328-12:20240409-12:20240426-12:20240503-12:20240529-12:20240614-12:20240630-12:20240809-12:20240909-12:20241021-12:20241226-12:20250208-12:20250307-12:20250313-12:20250313-22:20250825-12:20251014-12:20260524-1
 None known
schism
Debian:13
 All versions, plus listed versions
2:20250313-22:20250825-12:20251014-12:20260524-1
 None known
schism
Ubuntu:16.04:LTS
 All versions, plus listed versions
2:0+20110101-1build1
 None known
schism
Ubuntu:18.04:LTS
 All versions, plus listed versions
2:20160521-12:20170910-12:20180209-1
 None known
schism
Ubuntu:20.04:LTS
 All versions, plus listed versions
2:20190805-12:20190805-22:20190805-3
 None known
schism
Ubuntu:22.04:LTS
 All versions, plus listed versions
2:20200412-12:20210525-22:20211116-12:20220125-1
 None known
schism
Ubuntu:24.04:LTS
 All versions, plus listed versions
2:20221201-12:20230906-12:20231029-12:20240129-1
 None known
schism
Ubuntu:26.10
 All versions, plus listed versions
2:20251014-1
 None known
schism
Ubuntu:26.04:LTS
 All versions, plus listed versions
2:20250313-22:20250825-12:20251014-1
 None known
schismtracker
openSUSE:Tumbleweed
 before 20261102-1.1
20261102-1.1

History

History
RecordedChangedSources
affected, aliases, facts, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-112007 is a medium vulnerability (CVSS 6.9) in Schismtracker Schism Tracker, published October 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.13%, the 2nd percentile. Fixed in schismtracker 20261102-1.1.

References

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