---
id: CVE-2016-20099
title: >-
  L-SMASH through 2.14.5 contains an infinite loop vulnerability in
  vc1_importer_probe() in importer/vc1_imp.c that allows attackers to hang
  applications via crafted input files
summary: >-
  L-SMASH through 2.14.5 contains an infinite loop vulnerability in
  vc1_importer_probe() in importer/vc1_imp.c that allows attackers to hang
  applications via crafted input files. Attackers can supply a file consisting
  only of zero bytes, w…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-835
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T18:17:00.120'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2016-20099'
references:
  - url: >-
      https://github.com/l-smash/l-smash/blob/v2.14.5/importer/vc1_imp.c#L462-L488
    label: disclosure@vulncheck.com
  - url: 'https://github.com/l-smash/l-smash/pull/58'
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/l-smash-hevc-importer-double-free'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/l-smash-through-2.14.5-infinite-loop-in-vc-1-importer-probe
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-free
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
ingestedAt: '2026-10-14T15:36:13.992Z'
---

## Overview

L-SMASH through 2.14.5 contains an infinite loop vulnerability in vc1_importer_probe() in importer/vc1_imp.c that allows attackers to hang applications via crafted input files. Attackers can supply a file consisting only of zero bytes, which lsmash_read_file() probes automatically, causing indefinite CPU consumption and denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.