CVE-2026-112007

Name	CVE-2026-112007
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
schism (PTS)	bookworm	2:20221201-1	vulnerable
	trixie	2:20250313-2	vulnerable
	sid	2:20261102-4	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
schism	source	(unstable)	2:20261102-1

Fixed by: https://github.com/schismtracker/schismtracker/commit/03a7e29367bea085509059a40b6c1efe2681a7cb (20261102)