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Fencer Vulns
medium 6.5

CVE-2018-19217 json

In ncurses, possibly a 6.x version, there is a NULL pointer dereference at the function _nc_name_match that will lead to a denial of servic…

published 2018-11-12 7 y ago modified 2026-07-23 3 mo ago also EUVD-2018-10926

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

In ncurses, possibly a 6.x version, there is a NULL pointer dereference at the function _nc_name_match that will lead to a denial of service attack. NOTE: the original report stated version 6.1, but the issue did not reproduce for that version according to the maintainer or a reliable third-party

Patch / fix

  • ncurses Debian 14, Debian 13, Debian 12 6.0+20170701-1

debian advisories DEBIAN-CVE-2018-19217

  • ncurses Ubuntu Pro 14.04 LTS 5.9+20140118-1ubuntu1+esm1
  • ncurses Ubuntu Pro 16.04 LTS 6.0+20160213-1ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2018-19217

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-19217 updated cvss 6.5

ncurses: Null pointer dereference at function _nc_name_match

  • Red Hat Enterprise Linux 5 ncurses Red Hat Enterprise Linux 6 ncurses, ncurses-base, ncurses-libs, ncurses-term Red Hat Enterprise Linux 7 ncurses, ncurses-base, ncurses-libs, ncurses-term
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 ncurses, ncurses-base, ncurses-libs, ncurses-term, ncurses-c++-libs, ncurses-compat-libs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.16% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1643753 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.