CVE-2017-12952: The LoadString function in helper.h in libgig 4.0.0 allows remote attackers to cause a denial of service (NULL

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MEDIUM 6.5DOWNGRADE

CVE-2017-12952 is a medium-severity flaw (CVSS 6.5) affecting libgig. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The LoadString function in helper.h in libgig 4.0.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted gig file.

Why this priority

EPSS top 9%: very likely to be exploited
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	4.2% (top 9%)
CISA exploited list	No
Weakness	CWE-476
Published	2017-08-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: libgig0

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

Am I affected?

Timeline

2017-08-28 19:29 UTCPublished CVE record published
2026-06-17 01:04 UTCUpdated Record last modified

libgig0 libgig DOWNGRADE

Affected: 4.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison libgig sudo apt install libgig=<VERSION_BEFORE_4.0.0> sudo apt-mark hold libgig

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

dnf --showduplicates list libgig sudo dnf downgrade libgig-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add libgig

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: libgig 4.0.0 (LinuxSampler) - Multiple Vulnerabilities

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-2017-12952?

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

Is CVE-2017-12952 being exploited?

CVE-2017-12952 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-2017-12952 affect?

CVE-2017-12952 affects libgig. Severity is medium (CVSS 6.5). The LoadString function in helper.h in libgig 4.0.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted gig file.

How urgent is CVE-2017-12952?

Priority 50/100. EPSS top 9%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2021-32294 HIGH 8.8 UPGRADE An issue was discovered in libgig through 20200507
CVE-2018-18197 CRITICAL 9.8 DOWNGRADE An issue was discovered in libgig 4.1.0
CVE-2018-18196 HIGH 8.8 DOWNGRADE An issue was discovered in libgig 4.1.0
CVE-2018-18195 MEDIUM 6.5 DOWNGRADE An issue was discovered in libgig 4.1.0
CVE-2018-18194 HIGH 8.8 DOWNGRADE An issue was discovered in libgig 4.1.0

References

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