CVE-2026-111136

libInstPatch through 1.1.7 contains a heap out-of-bounds write vulnerability in the SoundFont 2 loader because ipatch_sf2_gen_is_valid() does not range-check generator IDs before the validity mask test. Attackers can supply crafted SF2 files with out-of-range pgen or igen generator IDs to write attacker-chosen values past the zone genarray, corrupting heap memory and crashing Swami or other consumers.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/swami/libinstpatch
https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Gen.c#L189-L205
https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Reader.c#L1355-L1370
https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Reader.c#L954-L969
https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-write
https://www.vulncheck.com/advisories/libinstpatch-through-1.1.7-heap-out-of-bounds-write-via-ipatch-sf2-gen-is-valid
https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-write

Configurations

No configuration.

History

15 Oct 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-write -~~	() https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-write -

15 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 19:17

Updated : 2026-10-16 18:25

NVD link : CVE-2026-111136

Mitre link : CVE-2026-111136

CVE.ORG link : CVE-2026-111136

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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