CVE-2019-15151: AdPlug 2.3.1 has a double free in the Cu6mPlayer class in u6m.h.

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CRITICAL 9.8REMOTEDOWNGRADEMITIGATE

CVE-2019-15151 is a critical-severity flaw (CVSS 9.8) affecting adplug, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AdPlug 2.3.1 has a double free in the Cu6mPlayer class in u6m.h.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-415
Published	2019-08-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: adplug project · fedoraproject

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

Am I affected?

Timeline

2019-08-18 21:15 UTCPublished CVE record published
2026-06-17 02:19 UTCUpdated Record last modified

adplug project adplug DOWNGRADE

Affected: 2.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.3.1 (Debian / Ubuntu)

apt-cache madison adplug sudo apt install adplug=<VERSION_BEFORE_2.3.1> sudo apt-mark hold adplug

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list adplug sudo dnf downgrade adplug-<VERSION_BEFORE_2.3.1> sudo dnf versionlock add adplug

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

fedoraproject fedora MITIGATE

Affected: 32 · 33

Fixed in: no fixed release known

Safe to downgrade to: a release before 32

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-2019-15151?

adplug: downgrade or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-15151 being exploited?

CVE-2019-15151 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-2019-15151 affect?

CVE-2019-15151 affects adplug, fedora. Severity is critical (CVSS 9.8). AdPlug 2.3.1 has a double free in the Cu6mPlayer class in u6m.h.

How urgent is CVE-2019-15151?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-14734 HIGH 8.8 DOWNGRADE MITIGATE AdPlug 2.3.1 has multiple heap-based buffer overflows in CmtkLoader::load() in mtk.cpp.
CVE-2019-14733 HIGH 8.8 DOWNGRADE MITIGATE AdPlug 2.3.1 has multiple heap-based buffer overflows in CradLoader::load() in rad.cpp.
CVE-2019-14732 HIGH 8.8 DOWNGRADE MITIGATE AdPlug 2.3.1 has multiple heap-based buffer overflows in Ca2mLoader::load() in a2m.cpp.
CVE-2019-14692 HIGH 8.8 DOWNGRADE MITIGATE AdPlug 2.3.1 has a heap-based buffer overflow in CmkjPlayer::load() in mkj.cpp.
CVE-2019-14691 HIGH 8.8 DOWNGRADE MITIGATE AdPlug 2.3.1 has a heap-based buffer overflow in CdtmLoader::load() in dtm.cpp.

References

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