---
id: CVE-2018-20786
title: >-
  libvterm through 0+bzr726, as used in Vim and other products, mishandles
  certain out-of-memory conditions, leading to a denial of service (application
  crash), related to screen.c, state.c, and vterm.c.
summary: >-
  libvterm through 0+bzr726, as used in Vim and other products, mishandles
  certain out-of-memory conditions, leading to a denial of service (application
  crash), related to screen.c, state.c, and vterm.c.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: leonerd
product: libvterm
affected:
  - libvterm <= 0\+bzr726
published: '2019-02-24'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T18:17:19.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-20786'
references:
  - url: 'https://github.com/vim/vim/commit/cd929f7ba8cc5b6d6dcf35c8b34124e969fed6b8'
    label: cve@mitre.org
  - url: 'https://github.com/vim/vim/issues/3711'
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/4309-1/'
    label: cve@mitre.org
  - url: 'https://github.com/vim/vim/commit/cd929f7ba8cc5b6d6dcf35c8b34124e969fed6b8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/vim/vim/issues/3711'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4309-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T17:41:44.691828Z'
epss: 0.02916
epssPercentile: 0.86941
ingestedAt: '2026-10-15T18:23:58.402Z'
---

## Overview

libvterm through 0+bzr726, as used in Vim and other products, mishandles certain out-of-memory conditions, leading to a denial of service (application crash), related to screen.c, state.c, and vterm.c.

## Affected

- `libvterm <= 0\+bzr726`

## Remediation

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