7.5

CVE-2018-20786: leonerd libvterm NULL Pointer Dereference

CVSS: 7.5v3.0HighModified
AliasesUBUNTU-CVE-2018-20786DEBIAN-CVE-2018-20786CGA-9rhg-35fv-9h27
Published 24-02-2019Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2018-20786 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in leonerd libvterm. EPSS estimates a 2.89% chance of exploitation in the next 30 days, higher than 86.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
2.89%
0%100%
Low · -0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 3
USN-4309-1CGA-C789-F9M3-RHMMCGA-P779-9JWM-H39Q

Timeline

  1. 24-02-2019
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

2.89%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

-0.08 pp

From 2.97% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.89%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Vim

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • libvtermAll versions (No fix recorded)
  • vim< 2:8.1.0693-1
Ubuntu2 products
  • libvtermAll versions (No fix recorded)
  • vim< 2:8.0.1453-1ubuntu1.3
Chainguard1 product
  • libvterm< 0.3.3-r4
Leonerd1 product
Wolfi1 product
  • libvterm< 0.3.3-r4

5 vendors · 7 products

References

7 links