CVE-2020-28248: An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocatio

Q: How do I fix CVE-2020-28248?

png-img: upgrade to 3.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-28248 being exploited?

CVE-2020-28248 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-2020-28248 affect?

CVE-2020-28248 affects png-img. Severity is high (CVSS 8.8). An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.

Q: How urgent is CVE-2020-28248?

Priority 56/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2020-28248 is a high-severity flaw (CVSS 8.8) affecting png-img. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-190, CWE-787
Published	2021-02-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: png-img project

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

Am I affected?

Timeline

2021-02-20 00:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

png-img project png-img UPGRADE

Affected: < 3.1.0

Fixed in: 3.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy png-img || rpm -q png-img || png-img --version

2. UPGRADE to 3.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade png-img

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade png-img

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-2020-28248?

png-img: upgrade to 3.1.0. Exact commands for each OS are on this page.

Is CVE-2020-28248 being exploited?

CVE-2020-28248 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-2020-28248 affect?

CVE-2020-28248 affects png-img. Severity is high (CVSS 8.8). An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.

How urgent is CVE-2020-28248?

Priority 56/100. High severity; Public exploit reference

References

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