CVE-2018-9240: ncmpc through 0.29 is prone to a NULL pointer dereference flaw

Q: How do I fix CVE-2018-9240?

ncmpc: upgrade to newer than 0.29; debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2018-9240 being exploited?

CVE-2018-9240 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-9240 affect?

CVE-2018-9240 affects ncmpc, debian linux, ubuntu linux. Severity is high (CVSS 7.5). ncmpc through 0.29 is prone to a NULL pointer dereference flaw. If a user uses the chat screen and another client sends a long chat message, a crash and denial of service could occur.

Q: How urgent is CVE-2018-9240?

Priority 56/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2018-9240 is a high-severity flaw (CVSS 7.5) affecting ncmpc, debian linux, ubuntu linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ncmpc through 0.29 is prone to a NULL pointer dereference flaw. If a user uses the chat screen and another client sends a long chat message, a crash and denial of service could occur.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-476
Published	2018-04-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: canonical · debian · ncmpc project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-04-03 22:29 UTCPublished CVE record published
2026-06-17 02:06 UTCUpdated Record last modified

ncmpc project ncmpc UPGRADE

Affected: <= 0.29

Fixed in: newer than 0.29

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ncmpc || rpm -q ncmpc || ncmpc --version

2. UPGRADE to newer than 0.29 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ncmpc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ncmpc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

canonical ubuntu linux MITIGATE

Affected: 16.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-9240?

ncmpc: upgrade to newer than 0.29; debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-9240 being exploited?

CVE-2018-9240 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-9240 affect?

CVE-2018-9240 affects ncmpc, debian linux, ubuntu linux. Severity is high (CVSS 7.5). ncmpc through 0.29 is prone to a NULL pointer dereference flaw. If a user uses the chat screen and another client sends a long chat message, a crash and denial of service could occur.

How urgent is CVE-2018-9240?

Priority 56/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities

References

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