Vulnerability · Published Sep 24, 2026 · Assigned by mitre
CVE-2026-88386
Medium 5.5
In plain English
A medium-severity heap buffer overflow in the libsndfile package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 95.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
libsndfile 1.2.2 contains a misaligned memory access issue in psf_binheader_readf() while parsing WAV fmt chunks. A specially crafted WAV file can cause the function to cast an unaligned destination address to unsigned int * and perform a 4-byte store. This results in undefined behavior leading to denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libsndfile | no fix listed | DEBIAN-CVE-2026-88386 |
| Debian:13 | libsndfile | no fix listed | DEBIAN-CVE-2026-88386 |
| Debian:14 | libsndfile | no fix listed | DEBIAN-CVE-2026-88386 |
| Ubuntu:22.04:LTS | libsndfile | no fix listed | UBUNTU-CVE-2026-88386 |
| Ubuntu:24.04:LTS | libsndfile | no fix listed | UBUNTU-CVE-2026-88386 |
| Ubuntu:26.04:LTS | libsndfile | no fix listed | UBUNTU-CVE-2026-88386 |
| Ubuntu:26.10 | libsndfile | no fix listed | UBUNTU-CVE-2026-88386 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H