CVE-2019-13147: In Audio File Library (aka audiofile) 0.3.6, there exists one NULL pointer dereference bug in ulaw2linear_buf

This month

MEDIUM 6.5WATCHLISTDOWNGRADEMITIGATE

CVE-2019-13147 is a medium-severity flaw (CVSS 6.5) affecting audiofile, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Audio File Library (aka audiofile) 0.3.6, there exists one NULL pointer dereference bug in ulaw2linear_buf in G711.cpp in libmodules.a that allows an attacker to cause a denial of service via a crafted file.

Why this priority

Public exploit reference
On your watchlist

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-476
Published	2019-07-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: audiofile · debian

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

Am I affected?

Timeline

2019-07-02 00:15 UTCPublished CVE record published
2026-06-17 02:16 UTCUpdated Record last modified

audiofile audiofile DOWNGRADE

Affected: 0.3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.6 (Debian / Ubuntu)

apt-cache madison audiofile sudo apt install audiofile=<VERSION_BEFORE_0.3.6> sudo apt-mark hold audiofile

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

dnf --showduplicates list audiofile sudo dnf downgrade audiofile-<VERSION_BEFORE_0.3.6> sudo dnf versionlock add audiofile

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.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

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.

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-2019-13147?

audiofile: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-13147 being exploited?

CVE-2019-13147 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-2019-13147 affect?

CVE-2019-13147 affects audiofile, debian linux. Severity is medium (CVSS 6.5). In Audio File Library (aka audiofile) 0.3.6, there exists one NULL pointer dereference bug in ulaw2linear_buf in G711.cpp in libmodules.a that allows an attacker to cause a denial of service via a crafted file.

How urgent is CVE-2019-13147?

Priority 53/100. Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2025-50950 HIGH 7.5 DOWNGRADE Audiofile v0.3.7 was discovered to contain a NULL pointer dereference via the ModuleState::setup function.
CVE-2022-24599 MEDIUM 6.5 DOWNGRADE MITIGATE In autofile Audio File Library 0.3.6, there exists one memory leak vulnerability in printfileinfo, in printinf
CVE-2020-18781 MEDIUM 5.5 DOWNGRADE Heap buffer overflow vulnerability in FilePOSIX::read in File.cpp in audiofile 0.3.6 may cause denial-of-servi
CVE-2018-17095 HIGH 8.8 DOWNGRADE MITIGATE An issue has been discovered in mpruett Audio File Library (aka audiofile) 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2,
CVE-2018-13440 MEDIUM 6.5 DOWNGRADE MITIGATE The audiofile Audio File Library 0.3.6 has a NULL pointer dereference bug in ModuleState::setup in modules/Mod

References

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