CVE-2018-14876: An issue was discovered in image_save_png in image/image-png.cpp in Free Lossless Image Format (FLIF) 0.3

Routine

MEDIUM 5.5DOWNGRADE

CVE-2018-14876 is a medium-severity flaw (CVSS 5.5) affecting flif. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in image_save_png in image/image-png.cpp in Free Lossless Image Format (FLIF) 0.3. Attackers can trigger a longjmp that leads to an uninitialized stack frame after a libpng error concerning the IHDR image width.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Published	2018-08-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: flif

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

Am I affected?

Timeline

2018-08-03 00:29 UTCPublished CVE record published
2026-06-17 01:41 UTCUpdated Record last modified

flif flif DOWNGRADE

Affected: 0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3 (Debian / Ubuntu)

apt-cache madison flif sudo apt install flif=<VERSION_BEFORE_0.3> sudo apt-mark hold flif

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

dnf --showduplicates list flif sudo dnf downgrade flif-<VERSION_BEFORE_0.3> sudo dnf versionlock add flif

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-2018-14876?

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

Is CVE-2018-14876 being exploited?

CVE-2018-14876 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-2018-14876 affect?

CVE-2018-14876 affects flif. Severity is medium (CVSS 5.5). An issue was discovered in image_save_png in image/image-png.cpp in Free Lossless Image Format (FLIF) 0.3. Attackers can trigger a longjmp that leads to an uninitialized stack frame after a libpng error concerning the IHDR image width.

How urgent is CVE-2018-14876?

Priority 39/100. Public exploit reference

Software pages

libpng vulnerabilities

Related CVEs

CVE-2019-14373 HIGH 7.8 DOWNGRADE An issue was discovered in image_save_png in image/image-png.cpp in Free Lossless Image Format (FLIF) 0.3
CVE-2018-12109 HIGH 7.8 DOWNGRADE An issue was discovered in Free Lossless Image Format (FLIF) 0.3
CVE-2018-11507 MEDIUM 6.5 DOWNGRADE An issue was discovered in Free Lossless Image Format (FLIF) 0.3
CVE-2018-10971 MEDIUM 5.5 DOWNGRADE An issue was discovered in Free Lossless Image Format (FLIF) 0.3
CVE-2017-14232 MEDIUM 5.5 DOWNGRADE UPGRADE The read_chunk function in flif-dec.cpp in Free Lossless Image Format (FLIF) 0.3 allows remote attackers to ca

References

← Back to latest CVEs