CVE-2019-15757: libMirage 3.2.2 in CDemu has a NULL pointer dereference in the NRG parser in parser.c.

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MEDIUM 6.5DOWNGRADE

CVE-2019-15757 is a medium-severity flaw (CVSS 6.5) affecting libmirage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libMirage 3.2.2 in CDemu has a NULL pointer dereference in the NRG parser in parser.c.

Why this priority

Public exploit reference

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	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-476
Published	2019-08-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: libmirage project

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

Am I affected?

Timeline

2019-08-29 01:15 UTCPublished CVE record published
2026-06-17 02:21 UTCUpdated Record last modified

libmirage project libmirage DOWNGRADE

Affected: 3.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.2.2 (Debian / Ubuntu)

apt-cache madison libmirage sudo apt install libmirage=<VERSION_BEFORE_3.2.2> sudo apt-mark hold libmirage

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

dnf --showduplicates list libmirage sudo dnf downgrade libmirage-<VERSION_BEFORE_3.2.2> sudo dnf versionlock add libmirage

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.

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-2019-15757?

libmirage: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-15757 being exploited?

CVE-2019-15757 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-2019-15757 affect?

CVE-2019-15757 affects libmirage. Severity is medium (CVSS 6.5). libMirage 3.2.2 in CDemu has a NULL pointer dereference in the NRG parser in parser.c.

How urgent is CVE-2019-15757?

Priority 47/100. Public exploit reference

Related CVEs

CVE-2019-15540 HIGH 7.8 DOWNGRADE filters/filter-cso/filter-stream.c in the CSO filter in libMirage 3.2.2 in CDemu does not validate the part si

References

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