# CVE-2026-111136: libinstpatch: libInstPatch through 1.1.7 contains a heap out-of-bounds write vulnerability in the SoundFont 2 loader because ipatch...

CVE-2026-111136 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2026-111136, released November 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-111136
- Priority: Routine
- CVSS: n/a (moderate)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libinstpatch Debian 14 | 1.1.8-1 | [DEBIAN-CVE-2026-111136](https://patchblox.com/security/data/fix/linux/debian-cve-2026-111136.md) | Nov 1, 2026 |
| Linux | libinstpatch Fedora 43 | 1.1.8-1.fc43 | [FEDORA-2026-7F1BCC426B](https://patchblox.com/security/data/fix/linux/fedora-2026-7f1bcc426b.md) | Nov 7, 2026 |
| Linux | libinstpatch-debuginfo Fedora 43 | 1.1.8-1.fc43 | [FEDORA-2026-7F1BCC426B](https://patchblox.com/security/data/fix/linux/fedora-2026-7f1bcc426b.md) | Nov 7, 2026 |
| Linux | libinstpatch-debugsource Fedora 43 | 1.1.8-1.fc43 | [FEDORA-2026-7F1BCC426B](https://patchblox.com/security/data/fix/linux/fedora-2026-7f1bcc426b.md) | Nov 7, 2026 |
| Linux | libinstpatch-devel Fedora 43 | 1.1.8-1.fc43 | [FEDORA-2026-7F1BCC426B](https://patchblox.com/security/data/fix/linux/fedora-2026-7f1bcc426b.md) | Nov 7, 2026 |
| Linux | libinstpatch-doc Fedora 43 | 1.1.8-1.fc43 | [FEDORA-2026-7F1BCC426B](https://patchblox.com/security/data/fix/linux/fedora-2026-7f1bcc426b.md) | Nov 7, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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