CVE-2007-2445: The png_handle_tRNS function in pngrutil.c in libpng before 1.0.25 and 1.2.x before 1.2.17 allows remote attac

Q: How do I fix CVE-2007-2445?

libpng: upgrade to newer than 1.2.16. Exact commands for each OS are on this page.

Q: Is CVE-2007-2445 being exploited?

CVE-2007-2445 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2007-2445 affect?

CVE-2007-2445 affects libpng. Severity is medium (CVSS 5.0). The png_handle_tRNS function in pngrutil.c in libpng before 1.0.25 and 1.2.x before 1.2.17 allows remote attackers to cause a denial of service (application crash) via a grayscale PNG image with a bad tRNS chunk CRC value.

Q: How urgent is CVE-2007-2445?

Priority 41/100. EPSS top 7%: very likely to be exploited

This month

MEDIUM 5.0UPGRADE

CVE-2007-2445 is a medium-severity flaw (CVSS 5.0) affecting libpng. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The png_handle_tRNS function in pngrutil.c in libpng before 1.0.25 and 1.2.x before 1.2.17 allows remote attackers to cause a denial of service (application crash) via a grayscale PNG image with a bad tRNS chunk CRC value.

Why this priority

EPSS top 7%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	5.2% (top 7%)
CISA exploited list	No
Published	2007-05-16
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: png reference library

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-05-16 22:30 UTCPublished CVE record published
2026-06-16 22:39 UTCUpdated Record last modified

png reference library libpng UPGRADE

Affected: <= 1.0.15 · <= 1.2.16

Fixed in: newer than 1.2.16

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.2.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libpng

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libpng

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2007-2445?

libpng: upgrade to newer than 1.2.16. Exact commands for each OS are on this page.

Is CVE-2007-2445 being exploited?

CVE-2007-2445 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-2007-2445 affect?

CVE-2007-2445 affects libpng. Severity is medium (CVSS 5.0). The png_handle_tRNS function in pngrutil.c in libpng before 1.0.25 and 1.2.x before 1.2.17 allows remote attackers to cause a denial of service (application crash) via a grayscale PNG image with a bad tRNS chunk CRC value.

How urgent is CVE-2007-2445?

Priority 41/100. EPSS top 7%: very likely to be exploited

Software pages

libpng vulnerabilities

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References

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