CVE-2026-111136libInstPatch through 1.1.7 Heap Out-of-Bounds Write via ipatch_sf2_gen_is_valid
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
swami libinstpatch swami:libinstpatch (from the name) | through 1.1.7 | CNA record |
References
- https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-writetechnical-description
- https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Gen.c#L189-L205technical-description
- https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Reader.c#L1355-L1370technical-description
- https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Reader.c#L954-L969technical-description
- https://github.com/swami/libinstpatchproduct
- https://www.vulncheck.com/advisories/libinstpatch-through-1.1.7-heap-out-of-bounds-write-via-ipatch-sf2-gen-is-validthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.