CVE-2026-111136CWE-787

CVE-2026-111136

Medium · published October 15, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
9.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS v4.0
6.9 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00198 · 9.1th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-15T23:17Z
References (7)
https://github.com/swami/libinstpatch · [email protected]https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Gen.c#L189-L205 · [email protected]https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Reader.c#L1355-L1370 · [email protected]https://github.com/swami/libinstpatch/blob/4ff1939ccc24de204d41b3ab734fc1aece919184/libinstpatch/IpatchSF2Reader.c#L954-L969 · [email protected]https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-write · [email protected]https://www.vulncheck.com/advisories/libinstpatch-through-1.1.7-heap-out-of-bounds-write-via-ipatch-sf2-gen-is-valid · [email protected]https://hackmd.io/@haind-pwn/libinstpatch-sf2-generator-id-oob-write · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 15 OCT 18:57Z
    libInstPatch through 1.1.7 Heap Out-of-Bounds Write via ipatch_sf2_gen_is_valid
    cvelistv5
  • 15 OCT 18:57Z
    libInstPatch through 1.1.7 Heap Out-of-Bounds Write via ipatch_sf2_gen_is_valid
    cvelistv5