CVE-2015-7700: Double-free vulnerability in the sPLT chunk structure and png.c in pngcrush before 1.7.87 allows attackers to

Q: How do I fix CVE-2015-7700?

pngcrush: upgrade to newer than 1.7.86. Exact commands for each OS are on this page.

Q: Is CVE-2015-7700 being exploited?

CVE-2015-7700 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-2015-7700 affect?

CVE-2015-7700 affects pngcrush. Severity is critical (CVSS 9.8). Double-free vulnerability in the sPLT chunk structure and png.c in pngcrush before 1.7.87 allows attackers to have unspecified impact via unknown vectors.

Q: How urgent is CVE-2015-7700?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2015-7700 is a critical-severity flaw (CVSS 9.8) affecting pngcrush. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Double-free vulnerability in the sPLT chunk structure and png.c in pngcrush before 1.7.87 allows attackers to have unspecified impact via unknown vectors.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-415
Published	2017-08-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pngcrush project

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

Am I affected?

Timeline

2017-08-31 22:29 UTCPublished CVE record published
2026-06-17 00:32 UTCUpdated Record last modified

pngcrush project pngcrush UPGRADE

Affected: <= 1.7.86

Fixed in: newer than 1.7.86

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.7.86 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pngcrush

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-2015-7700?

pngcrush: upgrade to newer than 1.7.86. Exact commands for each OS are on this page.

Is CVE-2015-7700 being exploited?

CVE-2015-7700 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-2015-7700 affect?

CVE-2015-7700 affects pngcrush. Severity is critical (CVSS 9.8). Double-free vulnerability in the sPLT chunk structure and png.c in pngcrush before 1.7.87 allows attackers to have unspecified impact via unknown vectors.

How urgent is CVE-2015-7700?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2015-2158 HIGH 7.8 UPGRADE Off-by-one error in the pngcrush_measure_idat function in pngcrush.c in pngcrush before 1.7.84 allows remote a

References

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