CVE-2026-75904
published 2026-08-18CVE-2026-75904: libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index…
PriorityP411low3.3CVSS 3.1
AVLACLPRNUIRSUCLINAN
EPSS
0.19%
7.8th percentile
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching the note test before an instrument is assigned carries zero. A 32-byte MIDI file supplied to the library's public ModPlug_Load entry point drives the path through CSoundFile::Create, CSoundFile::ReadMID, and MID_ReadPatterns to the read. The byte read out of bounds determines whether a note event is treated as looping, so adjacent static storage influences playback state.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| konstanty_bialkowski | libmodplug | <= 0.8.9.1 | — |
CVSS provenance
nvdv3.13.3LOWCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
nvdv4.04.8MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/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
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Bugzilla
CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file [epel-all]
bugzilla·2026-08-24·CVSS 3.3
CVE-2026-75904 [LOW] CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file [epel-all]
CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching t
Bugzilla
CVE-2026-75904 qmplay2: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
bugzilla·2026-08-24·CVSS 3.3
CVE-2026-75904 [LOW] CVE-2026-75904 qmplay2: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
CVE-2026-75904 qmplay2: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching th
Bugzilla
CVE-2026-75904 SDL3_sound: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
bugzilla·2026-08-24·CVSS 3.3
CVE-2026-75904 [LOW] CVE-2026-75904 SDL3_sound: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
CVE-2026-75904 SDL3_sound: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching
Bugzilla
CVE-2026-75904 SDL2_sound: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
bugzilla·2026-08-24·CVSS 3.3
CVE-2026-75904 [LOW] CVE-2026-75904 SDL2_sound: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
CVE-2026-75904 SDL2_sound: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching
Bugzilla
CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
bugzilla·2026-08-24·CVSS 3.3
CVE-2026-75904 [LOW] CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching
Bugzilla
CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file
bugzilla·2026-08-18·CVSS 3.3
CVE-2026-75904 [LOW] CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file
CVE-2026-75904 libmodplug: libmodplug: Out-of-bounds read via crafted MIDI file
libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching the note test before an instrument is assigned carries zero. A 32-byte MIDI file supplied to the library's public ModPlug_Load entry point drives the path through CSoundFile::Create, CSoundFile::ReadMID, and MID_ReadPatterns to the read.
https://github.com/Konstanty/libmodplughttps://github.com/Konstanty/libmodplug/blob/d1b97ed0020bc620a059d3675d1854b40bd2608d/src/load_mid.cpp#L829https://github.com/Konstanty/libmodplug/blob/d1b97ed0020bc620a059d3675d1854b40bd2608d/src/load_pat.cpp#L213-L217https://github.com/Konstanty/libmodplug/issues/103https://www.vulncheck.com/advisories/libmodplug-out-of-bounds-read-in-pat-smplooped-via-crafted-midi-filehttps://github.com/Konstanty/libmodplug/issues/103
2026-08-18
Published