CVE-2017-15267: In GNU Libextractor 1.4, there is a NULL Pointer Dereference in flac_metadata in flac_extractor.c.

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2017-15267 is a high-severity flaw (CVSS 7.5) affecting libextractor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In GNU Libextractor 1.4, there is a NULL Pointer Dereference in flac_metadata in flac_extractor.c.

Why this priority

High 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-476
Published	2017-10-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gnu

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

Am I affected?

Timeline

2017-10-11 17:29 UTCPublished CVE record published
2026-06-17 01:07 UTCUpdated Record last modified

gnu libextractor DOWNGRADE

Affected: 1.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4 (Debian / Ubuntu)

apt-cache madison libextractor sudo apt install libextractor=<VERSION_BEFORE_1.4> sudo apt-mark hold libextractor

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

dnf --showduplicates list libextractor sudo dnf downgrade libextractor-<VERSION_BEFORE_1.4> sudo dnf versionlock add libextractor

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-2017-15267?

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

Is CVE-2017-15267 being exploited?

CVE-2017-15267 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-2017-15267 affect?

CVE-2017-15267 affects libextractor. Severity is high (CVSS 7.5). In GNU Libextractor 1.4, there is a NULL Pointer Dereference in flac_metadata in flac_extractor.c.

How urgent is CVE-2017-15267?

Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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